ChangeLog:

	* s390-tdep.h (S390_ORIG_R2_REGNUM): Define.
	(S390_LAST_BREAK_REGNUM): Likewise.
	(S390_SYSTEM_CALL_REGNUM): Likewise.
	(S390_NUM_REGS): Update.

	(s390_regmap_last_break): Add declaration.
	(s390x_regmap_last_break): Likewise.
	(s390_regmap_system_call): Likewise.

	(tdesc_s390_linux32v1): Add declaration.
	(tdesc_s390_linux32v2): Likewise.
	(tdesc_s390_linux64v1): Likewise.
	(tdesc_s390_linux64v2): Likewise.
	(tdesc_s390x_linux64v1): Likewise.
	(tdesc_s390x_linux64v2): Likewise.

	* s390-tdep.c: Include new target description files
	"features/s390-linux32v1.c", "features/s390-linux32v2.c",
	"features/s390-linux64v1.c", "features/s390-linux64v2.c",
	"features/s390x-linux64v1.c", and "features/s390x-linux64v2.c".
	(s390_cannot_store_register): New function.
	(s390_write_pc): Likewise.
	(s390_dwarf_regmap): Add fields for new registers.
	(s390_regmap_gregset): Likewise.
	(s390x_regmap_gregset): Likewise.
	(s390_regmap_fpregset): Likewise.
	(s390_regmap_upper): Likewise.
	(s390_regmap_last_break): New variable.
	(s390x_regmap_last_break): Likewise.
	(s390_regmap_system_call): Likewise.
	(s390_last_break_regset): Likewise.
	(s390x_last_break_regset): Likewise.
	(s390_system_call_regset): Likewise.
	(s390_upper_regset_sections): Rename to ...
	(s390_linux64_regset_sections): ... this.
	(s390_linux32_regset_sections): New variable.
	(s390x_linux64_regset_sections): Likewise.
	(s390_linux32v1_regset_sections): Likewise.
	(s390_linux32v2_regset_sections): Likewise.
	(s390_linux64v1_regset_sections): Likewise.
	(s390_linux64v2_regset_sections): Likewise.
	(s390x_linux64v1_regset_sections): Likewise.
	(s390x_linux64v2_regset_sections): Likewise.
	(s390_regset_from_core_section): Handle .reg-s390-last-break and
	.reg-s390-system-call core file sections.
	(s390_core_read_description): Check for presence of
	.reg-s390-last-break and .reg-s390-system-call core file
	sections and return appropriate target description.
	(s390_gdbarch_init): Detect Linux-specific registers "orig_r2",
	"last_break" and "system_call" in target description.  Install
	appropriate gdbarch_core_regset_sections array.
	Call set_gdbarch_cannot_store_register and set_gdbarch_write_pc.
	(_initialize_s390_tdep): Initialize additional target descriptions.

	* s390-nat.c: Include "elf/common.h".
	(PTRACE_GETREGSET, PTRACE_SETREGSET): Define if undefined.
	(have_regset_last_break): New static variable.
	(have_regset_system_call): Likewise.
	(s390_native_supply): Handle S390_ORIG_R2_REGNUM.
	(s390_native_collect): Likewise.
	(fetch_regset, store_regset, check_regset): New functions.
	(s390_linux_fetch_inferior_registers): Handle S390_LAST_BREAK_REGNUM
	and S390_SYSTEM_CALL_REGNUM.
	(s390_linux_store_inferior_registers): Likewise.
	(s390_read_description): Check for presence of NT_S390_LAST_BREAK
	and NT_S390_SYSTEM_CALL regsets and use appropriate description.

	* features/Makefile (WHICH): Add s390-linux32v1, s390-linux64v1,
	s390x-linux64v1, s390-linux32v2, s390-linux64v2, and s390x-linux64v2.
	(s390-linux32v1-expedite): Define.
	(s390-linux32v2-expedite): Likewise.
	(s390-linux64v1-expedite): Likewise.
	(s390-linux64v2-expedite): Likewise.
	(s390x-linux64v1-expedite): Likewise.
	(s390x-linux64v2-expedite): Likewise.

	* features/s390-linux32.xml: Add orig_r2 register.
	* features/s390-linux64.xml: Likewise.
	* features/s390x-linux64.xml: Likewise.
	* features/s390-linux32v1.xml: New file.
	* features/s390-linux32v2.xml: Likewise.
	* features/s390-linux64v1.xml: Likewise.
	* features/s390-linux64v2.xml: Likewise.
	* features/s390x-linux64v1.xml: Likewise.
	* features/s390x-linux64v2.xml: Likewise.

	* features/s390-linux32.c: Regenerate.
	* features/s390-linux64.c: Likewise.
	* features/s390x-linux64.c: Likewise.
	* features/s390-linux32v1.c: New generated file.
	* features/s390-linux32v2.c: Likewise.
	* features/s390-linux64v1.c: Likewise.
	* features/s390-linux64v2.c: Likewise.
	* features/s390x-linux64v1.c: Likewise.
	* features/s390x-linux64v2.c: Likewise.

	* regformats/s390-linux32.dat: Regenerate.
	* regformats/s390-linux64.dat: Regenerate.
	* regformats/s390x-linux64.dat: Regenerate.
	* regformats/s390-linux32v1.dat: New generated file.
	* regformats/s390-linux32v2.dat: Likewise.
	* regformats/s390-linux64v1.dat: Likewise.
	* regformats/s390-linux64v2.dat: Likewise.
	* regformats/s390x-linux64v1.dat: Likewise.
	* regformats/s390x-linux64v2.dat: Likewise.

gdbserver/ChangeLog:

	* Makefile.in (s390-linux32v1.o, s390-linux32v1.c): New rules.
	(s390-linux32v2.o, s390-linux32v2.c): Likewise.
	(s390-linux64v1.o, s390-linux64v1.c): Likewise.
	(s390-linux64v2.o, s390-linux64v2.c): Likewise.
	(s390x-linux64v1.o, s390x-linux64v1.c): Likewise.
	(s390x-linux64v2.o, s390x-linux64v2.c): Likewise.
	* configure.srv [s390*-*-linux*] (srv_regobj): Add new objects.
	(srv_xmlfiles): Add new XML files.

	* linux-s390-low.c: Include "elf/common.h", <sys/ptrace.h>,
	and <sys/uio.h>.
	(PTRACE_GETREGSET, PTRACE_SETREGSET): Define if undefined.
	(init_registers_s390_linux32v1): Add prototype.
	(init_registers_s390_linux32v2): Likewise.
	(init_registers_s390_linux64v1): Likewise.
	(init_registers_s390_linux64v2): Likewise.
	(init_registers_s390x_linux64v1): Likewise.
	(init_registers_s390x_linux64v2): Likewise.
	(s390_num_regs): Increment to 52.
	(s390_regmap): Add orig_r2 register.
	(s390_num_regs_3264): Increment to 68.
	(s390_regmap_3264): Add orig_r2 register.
	(s390_collect_ptrace_register): Handle orig_r2 register.
	(s390_supply_ptrace_register): Likewise.
	(s390_fill_last_break): New function.
	(s390_store_last_break): Likewise.
	(s390_fill_system_call): New function.
	(s390_store_system_call): Likewise.
	(target_regsets): Handle NT_S390_LAST_BREAK and NT_S390_SYSTEM_CALL
	register sets.
	(s390_check_regset): New function.
	(s390_arch_setup): Check for presence of NT_S390_LAST_BREAK and
	NT_S390_SYSTEM_CALL regsets and use appropriate description.
	Update target_regsets for available register sets.

testsuite/ChangeLog:

	* gdb.base/callfuncs.exp (fetch_all_registers): Filter out read-only
	last_break register on s390*-*-* targets.

19 files changed, 671 insertions, 0 deletions

diff --git a/gdb/features/Makefile b/gdb/features/Makefile
index e0bfc3db580..5469772f555 100644
--- a/gdb/features/Makefile
+++ b/gdb/features/Makefile
@@ -42,6 +42,8 @@ WHICH = arm-with-iwmmxt arm-with-vfpv2 arm-with-vfpv3 arm-with-neon \
 	rs6000/powerpc-64l rs6000/powerpc-altivec64l rs6000/powerpc-vsx32l \
 	rs6000/powerpc-vsx64l rs6000/powerpc-cell32l rs6000/powerpc-cell64l \
 	s390-linux32 s390-linux64 s390x-linux64 \
+	s390-linux32v1 s390-linux64v1 s390x-linux64v1 \
+	s390-linux32v2 s390-linux64v2 s390x-linux64v2 \
 	tic6x-c64xp tic6x-c64x tic6x-c62x \
 	tic6x-c64xp-linux tic6x-c64x-linux tic6x-c62x-linux
 
@@ -63,8 +65,14 @@ powerpc-expedite = r1,pc
 rs6000/powerpc-cell32l-expedite = r1,pc,r0,orig_r3,r4
 rs6000/powerpc-cell64l-expedite = r1,pc,r0,orig_r3,r4
 s390-linux32-expedite = r14,r15,pswa
+s390-linux32v1-expedite = r14,r15,pswa
+s390-linux32v2-expedite = r14,r15,pswa
 s390-linux64-expedite = r14l,r15l,pswa
+s390-linux64v1-expedite = r14l,r15l,pswa
+s390-linux64v2-expedite = r14l,r15l,pswa
 s390x-linux64-expedite = r14,r15,pswa
+s390x-linux64v1-expedite = r14,r15,pswa
+s390x-linux64v2-expedite = r14,r15,pswa
 tic6x-c64xp-expedite = A15,PC
 tic6x-c64x-expedite = A15,PC
 tic6x-c62x-expedite = A15,PC
diff --git a/gdb/features/s390-linux32.c b/gdb/features/s390-linux32.c
index 0e28c726a39..0c5069f9e71 100644
--- a/gdb/features/s390-linux32.c
+++ b/gdb/features/s390-linux32.c
@@ -71,5 +71,8 @@ initialize_tdesc_s390_linux32 (void)
   tdesc_create_reg (feature, "f14", 49, 1, "float", 64, "ieee_double");
   tdesc_create_reg (feature, "f15", 50, 1, "float", 64, "ieee_double");
 
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.linux");
+  tdesc_create_reg (feature, "orig_r2", 51, 1, "system", 32, "uint32");
+
   tdesc_s390_linux32 = result;
 }
diff --git a/gdb/features/s390-linux32.xml b/gdb/features/s390-linux32.xml
index 3037e52869b..366ed6f48e9 100644
--- a/gdb/features/s390-linux32.xml
+++ b/gdb/features/s390-linux32.xml
@@ -14,4 +14,8 @@
   <xi:include href="s390-core32.xml"/>
   <xi:include href="s390-acr.xml"/>
   <xi:include href="s390-fpr.xml"/>
+
+  <feature name="org.gnu.gdb.s390.linux">
+    <reg name="orig_r2" bitsize="32" type="uint32" group="system"/>
+  </feature>
 </target>
diff --git a/gdb/features/s390-linux32v1.c b/gdb/features/s390-linux32v1.c
new file mode 100644
index 00000000000..d04641d4b7a
--- /dev/null
+++ b/gdb/features/s390-linux32v1.c
@@ -0,0 +1,79 @@
+/* THIS FILE IS GENERATED.  Original: s390-linux32v1.xml */
+
+#include "defs.h"
+#include "osabi.h"
+#include "target-descriptions.h"
+
+struct target_desc *tdesc_s390_linux32v1;
+static void
+initialize_tdesc_s390_linux32v1 (void)
+{
+  struct target_desc *result = allocate_target_description ();
+  struct tdesc_feature *feature;
+  struct tdesc_type *field_type, *type;
+
+  set_tdesc_architecture (result, bfd_scan_arch ("s390:31-bit"));
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.core");
+  tdesc_create_reg (feature, "pswm", 0, 1, "psw", 32, "uint32");
+  tdesc_create_reg (feature, "pswa", 1, 1, "psw", 32, "uint32");
+  tdesc_create_reg (feature, "r0", 2, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r1", 3, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r2", 4, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r3", 5, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r4", 6, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r5", 7, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r6", 8, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r7", 9, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r8", 10, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r9", 11, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r10", 12, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r11", 13, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r12", 14, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r13", 15, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r14", 16, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r15", 17, 1, "general", 32, "uint32");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.acr");
+  tdesc_create_reg (feature, "acr0", 18, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr1", 19, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr2", 20, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr3", 21, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr4", 22, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr5", 23, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr6", 24, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr7", 25, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr8", 26, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr9", 27, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr10", 28, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr11", 29, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr12", 30, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr13", 31, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr14", 32, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr15", 33, 1, "access", 32, "uint32");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.fpr");
+  tdesc_create_reg (feature, "fpc", 34, 1, "float", 32, "uint32");
+  tdesc_create_reg (feature, "f0", 35, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f1", 36, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f2", 37, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f3", 38, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f4", 39, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f5", 40, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f6", 41, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f7", 42, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f8", 43, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f9", 44, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f10", 45, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f11", 46, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f12", 47, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f13", 48, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f14", 49, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f15", 50, 1, "float", 64, "ieee_double");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.linux");
+  tdesc_create_reg (feature, "orig_r2", 51, 1, "system", 32, "uint32");
+  tdesc_create_reg (feature, "last_break", 52, 0, "system", 32, "code_ptr");
+
+  tdesc_s390_linux32v1 = result;
+}
diff --git a/gdb/features/s390-linux32v1.xml b/gdb/features/s390-linux32v1.xml
new file mode 100644
index 00000000000..ac1270af5b7
--- /dev/null
+++ b/gdb/features/s390-linux32v1.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2010, 2011 Free Software Foundation, Inc.
+
+     Copying and distribution of this file, with or without modification,
+     are permitted in any medium without royalty provided the copyright
+     notice and this notice are preserved.  -->
+
+<!-- S/390 31-bit user-level code on a machine operating
+     in ESA/390 architecture mode.  -->
+
+<!DOCTYPE target SYSTEM "gdb-target.dtd">
+<target>
+  <architecture>s390:31-bit</architecture>
+  <xi:include href="s390-core32.xml"/>
+  <xi:include href="s390-acr.xml"/>
+  <xi:include href="s390-fpr.xml"/>
+
+  <feature name="org.gnu.gdb.s390.linux">
+    <reg name="orig_r2" bitsize="32" type="uint32" group="system"/>
+    <reg name="last_break" bitsize="32" type="code_ptr" group="system" save-restore="no"/>
+  </feature>
+</target>
diff --git a/gdb/features/s390-linux32v2.c b/gdb/features/s390-linux32v2.c
new file mode 100644
index 00000000000..76620f0edf1
--- /dev/null
+++ b/gdb/features/s390-linux32v2.c
@@ -0,0 +1,80 @@
+/* THIS FILE IS GENERATED.  Original: s390-linux32v2.xml */
+
+#include "defs.h"
+#include "osabi.h"
+#include "target-descriptions.h"
+
+struct target_desc *tdesc_s390_linux32v2;
+static void
+initialize_tdesc_s390_linux32v2 (void)
+{
+  struct target_desc *result = allocate_target_description ();
+  struct tdesc_feature *feature;
+  struct tdesc_type *field_type, *type;
+
+  set_tdesc_architecture (result, bfd_scan_arch ("s390:31-bit"));
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.core");
+  tdesc_create_reg (feature, "pswm", 0, 1, "psw", 32, "uint32");
+  tdesc_create_reg (feature, "pswa", 1, 1, "psw", 32, "uint32");
+  tdesc_create_reg (feature, "r0", 2, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r1", 3, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r2", 4, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r3", 5, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r4", 6, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r5", 7, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r6", 8, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r7", 9, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r8", 10, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r9", 11, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r10", 12, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r11", 13, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r12", 14, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r13", 15, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r14", 16, 1, "general", 32, "uint32");
+  tdesc_create_reg (feature, "r15", 17, 1, "general", 32, "uint32");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.acr");
+  tdesc_create_reg (feature, "acr0", 18, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr1", 19, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr2", 20, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr3", 21, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr4", 22, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr5", 23, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr6", 24, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr7", 25, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr8", 26, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr9", 27, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr10", 28, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr11", 29, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr12", 30, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr13", 31, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr14", 32, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr15", 33, 1, "access", 32, "uint32");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.fpr");
+  tdesc_create_reg (feature, "fpc", 34, 1, "float", 32, "uint32");
+  tdesc_create_reg (feature, "f0", 35, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f1", 36, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f2", 37, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f3", 38, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f4", 39, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f5", 40, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f6", 41, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f7", 42, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f8", 43, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f9", 44, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f10", 45, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f11", 46, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f12", 47, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f13", 48, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f14", 49, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f15", 50, 1, "float", 64, "ieee_double");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.linux");
+  tdesc_create_reg (feature, "orig_r2", 51, 1, "system", 32, "uint32");
+  tdesc_create_reg (feature, "last_break", 52, 0, "system", 32, "code_ptr");
+  tdesc_create_reg (feature, "system_call", 53, 1, "system", 32, "uint32");
+
+  tdesc_s390_linux32v2 = result;
+}
diff --git a/gdb/features/s390-linux32v2.xml b/gdb/features/s390-linux32v2.xml
new file mode 100644
index 00000000000..487cd03c8a7
--- /dev/null
+++ b/gdb/features/s390-linux32v2.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2010, 2011 Free Software Foundation, Inc.
+
+     Copying and distribution of this file, with or without modification,
+     are permitted in any medium without royalty provided the copyright
+     notice and this notice are preserved.  -->
+
+<!-- S/390 31-bit user-level code on a machine operating
+     in ESA/390 architecture mode.  -->
+
+<!DOCTYPE target SYSTEM "gdb-target.dtd">
+<target>
+  <architecture>s390:31-bit</architecture>
+  <xi:include href="s390-core32.xml"/>
+  <xi:include href="s390-acr.xml"/>
+  <xi:include href="s390-fpr.xml"/>
+
+  <feature name="org.gnu.gdb.s390.linux">
+    <reg name="orig_r2" bitsize="32" type="uint32" group="system"/>
+    <reg name="last_break" bitsize="32" type="code_ptr" group="system" save-restore="no"/>
+    <reg name="system_call" bitsize="32" type="uint32" group="system"/>
+  </feature>
+</target>
diff --git a/gdb/features/s390-linux64.c b/gdb/features/s390-linux64.c
index e7acfe284c7..b8c4b168784 100644
--- a/gdb/features/s390-linux64.c
+++ b/gdb/features/s390-linux64.c
@@ -87,5 +87,8 @@ initialize_tdesc_s390_linux64 (void)
   tdesc_create_reg (feature, "f14", 65, 1, "float", 64, "ieee_double");
   tdesc_create_reg (feature, "f15", 66, 1, "float", 64, "ieee_double");
 
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.linux");
+  tdesc_create_reg (feature, "orig_r2", 67, 1, "system", 32, "uint32");
+
   tdesc_s390_linux64 = result;
 }
diff --git a/gdb/features/s390-linux64.xml b/gdb/features/s390-linux64.xml
index 36c71361353..89d7011d927 100644
--- a/gdb/features/s390-linux64.xml
+++ b/gdb/features/s390-linux64.xml
@@ -14,4 +14,8 @@
   <xi:include href="s390-core64.xml"/>
   <xi:include href="s390-acr.xml"/>
   <xi:include href="s390-fpr.xml"/>
+
+  <feature name="org.gnu.gdb.s390.linux">
+    <reg name="orig_r2" bitsize="32" type="uint32" group="system"/>
+  </feature>
 </target>
diff --git a/gdb/features/s390-linux64v1.c b/gdb/features/s390-linux64v1.c
new file mode 100644
index 00000000000..0e6865f1107
--- /dev/null
+++ b/gdb/features/s390-linux64v1.c
@@ -0,0 +1,95 @@
+/* THIS FILE IS GENERATED.  Original: s390-linux64v1.xml */
+
+#include "defs.h"
+#include "osabi.h"
+#include "target-descriptions.h"
+
+struct target_desc *tdesc_s390_linux64v1;
+static void
+initialize_tdesc_s390_linux64v1 (void)
+{
+  struct target_desc *result = allocate_target_description ();
+  struct tdesc_feature *feature;
+  struct tdesc_type *field_type, *type;
+
+  set_tdesc_architecture (result, bfd_scan_arch ("s390:31-bit"));
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.core");
+  tdesc_create_reg (feature, "pswm", 0, 1, "psw", 32, "uint32");
+  tdesc_create_reg (feature, "pswa", 1, 1, "psw", 32, "uint32");
+  tdesc_create_reg (feature, "r0h", 2, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r0l", 3, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r1h", 4, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r1l", 5, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r2h", 6, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r2l", 7, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r3h", 8, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r3l", 9, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r4h", 10, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r4l", 11, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r5h", 12, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r5l", 13, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r6h", 14, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r6l", 15, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r7h", 16, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r7l", 17, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r8h", 18, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r8l", 19, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r9h", 20, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r9l", 21, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r10h", 22, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r10l", 23, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r11h", 24, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r11l", 25, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r12h", 26, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r12l", 27, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r13h", 28, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r13l", 29, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r14h", 30, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r14l", 31, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r15h", 32, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r15l", 33, 1, "lower", 32, "uint32");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.acr");
+  tdesc_create_reg (feature, "acr0", 34, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr1", 35, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr2", 36, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr3", 37, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr4", 38, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr5", 39, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr6", 40, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr7", 41, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr8", 42, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr9", 43, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr10", 44, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr11", 45, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr12", 46, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr13", 47, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr14", 48, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr15", 49, 1, "access", 32, "uint32");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.fpr");
+  tdesc_create_reg (feature, "fpc", 50, 1, "float", 32, "uint32");
+  tdesc_create_reg (feature, "f0", 51, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f1", 52, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f2", 53, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f3", 54, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f4", 55, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f5", 56, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f6", 57, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f7", 58, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f8", 59, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f9", 60, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f10", 61, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f11", 62, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f12", 63, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f13", 64, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f14", 65, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f15", 66, 1, "float", 64, "ieee_double");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.linux");
+  tdesc_create_reg (feature, "orig_r2", 67, 1, "system", 32, "uint32");
+  tdesc_create_reg (feature, "last_break", 68, 0, "system", 32, "code_ptr");
+
+  tdesc_s390_linux64v1 = result;
+}
diff --git a/gdb/features/s390-linux64v1.xml b/gdb/features/s390-linux64v1.xml
new file mode 100644
index 00000000000..353cb2a5834
--- /dev/null
+++ b/gdb/features/s390-linux64v1.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2010, 2011 Free Software Foundation, Inc.
+
+     Copying and distribution of this file, with or without modification,
+     are permitted in any medium without royalty provided the copyright
+     notice and this notice are preserved.  -->
+
+<!-- S/390 31-bit user-level code on a machine operating
+     in z/Architecture mode.  -->
+
+<!DOCTYPE target SYSTEM "gdb-target.dtd">
+<target>
+  <architecture>s390:31-bit</architecture>
+  <xi:include href="s390-core64.xml"/>
+  <xi:include href="s390-acr.xml"/>
+  <xi:include href="s390-fpr.xml"/>
+
+  <feature name="org.gnu.gdb.s390.linux">
+    <reg name="orig_r2" bitsize="32" type="uint32" group="system"/>
+    <reg name="last_break" bitsize="32" type="code_ptr" group="system" save-restore="no"/>
+  </feature>
+</target>
diff --git a/gdb/features/s390-linux64v2.c b/gdb/features/s390-linux64v2.c
new file mode 100644
index 00000000000..13a6587738f
--- /dev/null
+++ b/gdb/features/s390-linux64v2.c
@@ -0,0 +1,96 @@
+/* THIS FILE IS GENERATED.  Original: s390-linux64v2.xml */
+
+#include "defs.h"
+#include "osabi.h"
+#include "target-descriptions.h"
+
+struct target_desc *tdesc_s390_linux64v2;
+static void
+initialize_tdesc_s390_linux64v2 (void)
+{
+  struct target_desc *result = allocate_target_description ();
+  struct tdesc_feature *feature;
+  struct tdesc_type *field_type, *type;
+
+  set_tdesc_architecture (result, bfd_scan_arch ("s390:31-bit"));
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.core");
+  tdesc_create_reg (feature, "pswm", 0, 1, "psw", 32, "uint32");
+  tdesc_create_reg (feature, "pswa", 1, 1, "psw", 32, "uint32");
+  tdesc_create_reg (feature, "r0h", 2, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r0l", 3, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r1h", 4, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r1l", 5, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r2h", 6, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r2l", 7, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r3h", 8, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r3l", 9, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r4h", 10, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r4l", 11, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r5h", 12, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r5l", 13, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r6h", 14, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r6l", 15, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r7h", 16, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r7l", 17, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r8h", 18, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r8l", 19, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r9h", 20, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r9l", 21, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r10h", 22, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r10l", 23, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r11h", 24, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r11l", 25, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r12h", 26, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r12l", 27, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r13h", 28, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r13l", 29, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r14h", 30, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r14l", 31, 1, "lower", 32, "uint32");
+  tdesc_create_reg (feature, "r15h", 32, 1, "upper", 32, "uint32");
+  tdesc_create_reg (feature, "r15l", 33, 1, "lower", 32, "uint32");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.acr");
+  tdesc_create_reg (feature, "acr0", 34, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr1", 35, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr2", 36, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr3", 37, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr4", 38, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr5", 39, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr6", 40, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr7", 41, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr8", 42, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr9", 43, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr10", 44, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr11", 45, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr12", 46, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr13", 47, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr14", 48, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr15", 49, 1, "access", 32, "uint32");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.fpr");
+  tdesc_create_reg (feature, "fpc", 50, 1, "float", 32, "uint32");
+  tdesc_create_reg (feature, "f0", 51, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f1", 52, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f2", 53, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f3", 54, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f4", 55, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f5", 56, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f6", 57, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f7", 58, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f8", 59, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f9", 60, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f10", 61, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f11", 62, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f12", 63, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f13", 64, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f14", 65, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f15", 66, 1, "float", 64, "ieee_double");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.linux");
+  tdesc_create_reg (feature, "orig_r2", 67, 1, "system", 32, "uint32");
+  tdesc_create_reg (feature, "last_break", 68, 0, "system", 32, "code_ptr");
+  tdesc_create_reg (feature, "system_call", 69, 1, "system", 32, "uint32");
+
+  tdesc_s390_linux64v2 = result;
+}
diff --git a/gdb/features/s390-linux64v2.xml b/gdb/features/s390-linux64v2.xml
new file mode 100644
index 00000000000..bdb3a434613
--- /dev/null
+++ b/gdb/features/s390-linux64v2.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2010, 2011 Free Software Foundation, Inc.
+
+     Copying and distribution of this file, with or without modification,
+     are permitted in any medium without royalty provided the copyright
+     notice and this notice are preserved.  -->
+
+<!-- S/390 31-bit user-level code on a machine operating
+     in z/Architecture mode.  -->
+
+<!DOCTYPE target SYSTEM "gdb-target.dtd">
+<target>
+  <architecture>s390:31-bit</architecture>
+  <xi:include href="s390-core64.xml"/>
+  <xi:include href="s390-acr.xml"/>
+  <xi:include href="s390-fpr.xml"/>
+
+  <feature name="org.gnu.gdb.s390.linux">
+    <reg name="orig_r2" bitsize="32" type="uint32" group="system"/>
+    <reg name="last_break" bitsize="32" type="code_ptr" group="system" save-restore="no"/>
+    <reg name="system_call" bitsize="32" type="uint32" group="system"/>
+  </feature>
+</target>
diff --git a/gdb/features/s390x-linux64.c b/gdb/features/s390x-linux64.c
index 06a9339b05a..9f95619b43f 100644
--- a/gdb/features/s390x-linux64.c
+++ b/gdb/features/s390x-linux64.c
@@ -71,5 +71,8 @@ initialize_tdesc_s390x_linux64 (void)
   tdesc_create_reg (feature, "f14", 49, 1, "float", 64, "ieee_double");
   tdesc_create_reg (feature, "f15", 50, 1, "float", 64, "ieee_double");
 
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.linux");
+  tdesc_create_reg (feature, "orig_r2", 51, 1, "system", 64, "uint64");
+
   tdesc_s390x_linux64 = result;
 }
diff --git a/gdb/features/s390x-linux64.xml b/gdb/features/s390x-linux64.xml
index c3a43e3b5b5..12da9815710 100644
--- a/gdb/features/s390x-linux64.xml
+++ b/gdb/features/s390x-linux64.xml
@@ -13,4 +13,8 @@
   <xi:include href="s390x-core64.xml"/>
   <xi:include href="s390-acr.xml"/>
   <xi:include href="s390-fpr.xml"/>
+
+  <feature name="org.gnu.gdb.s390.linux">
+    <reg name="orig_r2" bitsize="64" type="uint64" group="system"/>
+  </feature>
 </target>
diff --git a/gdb/features/s390x-linux64v1.c b/gdb/features/s390x-linux64v1.c
new file mode 100644
index 00000000000..b838c347778
--- /dev/null
+++ b/gdb/features/s390x-linux64v1.c
@@ -0,0 +1,79 @@
+/* THIS FILE IS GENERATED.  Original: s390x-linux64v1.xml */
+
+#include "defs.h"
+#include "osabi.h"
+#include "target-descriptions.h"
+
+struct target_desc *tdesc_s390x_linux64v1;
+static void
+initialize_tdesc_s390x_linux64v1 (void)
+{
+  struct target_desc *result = allocate_target_description ();
+  struct tdesc_feature *feature;
+  struct tdesc_type *field_type, *type;
+
+  set_tdesc_architecture (result, bfd_scan_arch ("s390:64-bit"));
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.core");
+  tdesc_create_reg (feature, "pswm", 0, 1, "psw", 64, "uint64");
+  tdesc_create_reg (feature, "pswa", 1, 1, "psw", 64, "uint64");
+  tdesc_create_reg (feature, "r0", 2, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r1", 3, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r2", 4, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r3", 5, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r4", 6, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r5", 7, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r6", 8, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r7", 9, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r8", 10, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r9", 11, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r10", 12, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r11", 13, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r12", 14, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r13", 15, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r14", 16, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r15", 17, 1, "general", 64, "uint64");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.acr");
+  tdesc_create_reg (feature, "acr0", 18, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr1", 19, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr2", 20, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr3", 21, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr4", 22, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr5", 23, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr6", 24, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr7", 25, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr8", 26, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr9", 27, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr10", 28, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr11", 29, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr12", 30, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr13", 31, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr14", 32, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr15", 33, 1, "access", 32, "uint32");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.fpr");
+  tdesc_create_reg (feature, "fpc", 34, 1, "float", 32, "uint32");
+  tdesc_create_reg (feature, "f0", 35, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f1", 36, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f2", 37, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f3", 38, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f4", 39, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f5", 40, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f6", 41, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f7", 42, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f8", 43, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f9", 44, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f10", 45, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f11", 46, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f12", 47, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f13", 48, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f14", 49, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f15", 50, 1, "float", 64, "ieee_double");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.linux");
+  tdesc_create_reg (feature, "orig_r2", 51, 1, "system", 64, "uint64");
+  tdesc_create_reg (feature, "last_break", 52, 0, "system", 64, "code_ptr");
+
+  tdesc_s390x_linux64v1 = result;
+}
diff --git a/gdb/features/s390x-linux64v1.xml b/gdb/features/s390x-linux64v1.xml
new file mode 100644
index 00000000000..2e02b6d223c
--- /dev/null
+++ b/gdb/features/s390x-linux64v1.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2010, 2011 Free Software Foundation, Inc.
+
+     Copying and distribution of this file, with or without modification,
+     are permitted in any medium without royalty provided the copyright
+     notice and this notice are preserved.  -->
+
+<!-- S/390 64-bit user-level code.  -->
+
+<!DOCTYPE target SYSTEM "gdb-target.dtd">
+<target>
+  <architecture>s390:64-bit</architecture>
+  <xi:include href="s390x-core64.xml"/>
+  <xi:include href="s390-acr.xml"/>
+  <xi:include href="s390-fpr.xml"/>
+
+  <feature name="org.gnu.gdb.s390.linux">
+    <reg name="orig_r2" bitsize="64" type="uint64" group="system"/>
+    <reg name="last_break" bitsize="64" type="code_ptr" group="system" save-restore="no"/>
+  </feature>
+</target>
diff --git a/gdb/features/s390x-linux64v2.c b/gdb/features/s390x-linux64v2.c
new file mode 100644
index 00000000000..90a25d8ee98
--- /dev/null
+++ b/gdb/features/s390x-linux64v2.c
@@ -0,0 +1,80 @@
+/* THIS FILE IS GENERATED.  Original: s390x-linux64v2.xml */
+
+#include "defs.h"
+#include "osabi.h"
+#include "target-descriptions.h"
+
+struct target_desc *tdesc_s390x_linux64v2;
+static void
+initialize_tdesc_s390x_linux64v2 (void)
+{
+  struct target_desc *result = allocate_target_description ();
+  struct tdesc_feature *feature;
+  struct tdesc_type *field_type, *type;
+
+  set_tdesc_architecture (result, bfd_scan_arch ("s390:64-bit"));
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.core");
+  tdesc_create_reg (feature, "pswm", 0, 1, "psw", 64, "uint64");
+  tdesc_create_reg (feature, "pswa", 1, 1, "psw", 64, "uint64");
+  tdesc_create_reg (feature, "r0", 2, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r1", 3, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r2", 4, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r3", 5, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r4", 6, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r5", 7, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r6", 8, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r7", 9, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r8", 10, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r9", 11, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r10", 12, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r11", 13, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r12", 14, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r13", 15, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r14", 16, 1, "general", 64, "uint64");
+  tdesc_create_reg (feature, "r15", 17, 1, "general", 64, "uint64");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.acr");
+  tdesc_create_reg (feature, "acr0", 18, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr1", 19, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr2", 20, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr3", 21, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr4", 22, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr5", 23, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr6", 24, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr7", 25, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr8", 26, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr9", 27, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr10", 28, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr11", 29, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr12", 30, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr13", 31, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr14", 32, 1, "access", 32, "uint32");
+  tdesc_create_reg (feature, "acr15", 33, 1, "access", 32, "uint32");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.fpr");
+  tdesc_create_reg (feature, "fpc", 34, 1, "float", 32, "uint32");
+  tdesc_create_reg (feature, "f0", 35, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f1", 36, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f2", 37, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f3", 38, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f4", 39, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f5", 40, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f6", 41, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f7", 42, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f8", 43, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f9", 44, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f10", 45, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f11", 46, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f12", 47, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f13", 48, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f14", 49, 1, "float", 64, "ieee_double");
+  tdesc_create_reg (feature, "f15", 50, 1, "float", 64, "ieee_double");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.s390.linux");
+  tdesc_create_reg (feature, "orig_r2", 51, 1, "system", 64, "uint64");
+  tdesc_create_reg (feature, "last_break", 52, 0, "system", 64, "code_ptr");
+  tdesc_create_reg (feature, "system_call", 53, 1, "system", 32, "uint32");
+
+  tdesc_s390x_linux64v2 = result;
+}
diff --git a/gdb/features/s390x-linux64v2.xml b/gdb/features/s390x-linux64v2.xml
new file mode 100644
index 00000000000..8697754ba2f
--- /dev/null
+++ b/gdb/features/s390x-linux64v2.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2010, 2011 Free Software Foundation, Inc.
+
+     Copying and distribution of this file, with or without modification,
+     are permitted in any medium without royalty provided the copyright
+     notice and this notice are preserved.  -->
+
+<!-- S/390 64-bit user-level code.  -->
+
+<!DOCTYPE target SYSTEM "gdb-target.dtd">
+<target>
+  <architecture>s390:64-bit</architecture>
+  <xi:include href="s390x-core64.xml"/>
+  <xi:include href="s390-acr.xml"/>
+  <xi:include href="s390-fpr.xml"/>
+
+  <feature name="org.gnu.gdb.s390.linux">
+    <reg name="orig_r2" bitsize="64" type="uint64" group="system"/>
+    <reg name="last_break" bitsize="64" type="code_ptr" group="system" save-restore="no"/>
+    <reg name="system_call" bitsize="32" type="uint32" group="system"/>
+  </feature>
+</target>