Handle ILP32 AARCH64 correctly for gdbserverusers/apinski/gdb-ilp32-gdbserver

In gdbserver, we need to send over 32bit registers
for pc/sp instead of 64bit as we do right now.
So we need another XML file for ILP32.

Tested using gdbserver with an ILP32 program and even
tested using gdbserver as an ILP32 program.

OK?

Thanks,
Andrew Pinski

ChangeLog:
	* aarch64-tdep.c: Include "features/aarch64_ilp32.c".
	(aarch64_gdbarch_init): Handle ilp32 correctly.
	(_initialize_aarch64_tdep): Call initialize_tdesc_aarch64_ilp32
	too.
	* features/Makefile (WHICH): Add aarch64_ilp32.
	(aarch64_ilp32-expedite): Set.
	(XMLTOC): Add aarch64_ilp32.xml.
	(features/aarch64_ilp32-core.xml): New file.
	(features/aarch64_ilp32.xml): New file.
	(features/aarch64_ilp32.c): Generate.
	(regformats/aarch64_ilp32.dat): Generate.

gdbserver/ChangeLog:
	* Makefile.in (clean): Remove aarch64_ilp32.c also.
	(aarch64_ilp32-ipa.o): New target.
	(aarch64_ilp32.c): New target.
	* configure.srv (aarch64*-*-linux*): Add ilp32 files
	to srv_regobj, srv_xmlfiles and ipa_obj.
	* linux-aarch64-ipa.c (init_registers_aarch64_ilp32):
	Declare.
	(tdesc_aarch64_ilp32): Likewise.
	(get_ipa_tdesc): Return tdesc_aarch64_ilp32 for ILP32.
	(initialize_low_tracepoint): Call init_registers_aarch64_ilp32
	for ILP32.
	* linux-aarch64-low.c (init_registers_aarch64_ilp32): Declare.
	(tdesc_aarch64_ilp32): Likewise.
	(aarch64_linux_read_description): Return tdesc_aarch64_ilp32
	for ILP32 executables.
	(initialize_low_arch): Call init_registers_aarch64_ilp32.

Signed-off-by: Andrew Pinski <apinski@cavium.com>

12 files changed, 417 insertions, 8 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 03db9e23355..7345fc9ed5d 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,19 @@
 2015-08-31  Andrew Pinski  <apinski@cavium.com>
 
+	* aarch64-tdep.c: Include "features/aarch64_ilp32.c".
+	(aarch64_gdbarch_init): Handle ilp32 correctly.
+	(_initialize_aarch64_tdep): Call initialize_tdesc_aarch64_ilp32
+	too.
+	* features/Makefile (WHICH): Add aarch64_ilp32.
+	(aarch64_ilp32-expedite): Set.
+	(XMLTOC): Add aarch64_ilp32.xml.
+	(features/aarch64_ilp32-core.xml): New file.
+	(features/aarch64_ilp32.xml): New file.
+	(features/aarch64_ilp32.c): Generate.
+	(regformats/aarch64_ilp32.dat): Generate.
+
+2015-08-31  Andrew Pinski  <apinski@cavium.com>
+
 	* aarch64-tdep.h (gdbarch_tdep): Add ilp32 field.
 	* aarch64-tdep.c (aarch64_gdbarch_init): Setup ILP32 support.
 	Make sure the gdbarches have compatible ilp32 flags.
diff --git a/gdb/aarch64-tdep.c b/gdb/aarch64-tdep.c
index 644d2117ac6..b68945aecc5 100644
--- a/gdb/aarch64-tdep.c
+++ b/gdb/aarch64-tdep.c
@@ -56,6 +56,7 @@
 #include "record-full.h"
 
 #include "features/aarch64.c"
+#include "features/aarch64_ilp32.c"
 
 #include "arch/aarch64-insn.h"
 
@@ -2655,11 +2656,14 @@ aarch64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
 
   /* Ensure we always have a target descriptor.  */
   if (!tdesc_has_registers (tdesc))
-    tdesc = tdesc_aarch64;
+    tdesc = ilp32 ? tdesc_aarch64_ilp32 : tdesc_aarch64;
 
   gdb_assert (tdesc);
 
-  feature = tdesc_find_feature (tdesc, "org.gnu.gdb.aarch64.core");
+  if (ilp32)
+    feature = tdesc_find_feature (tdesc, "org.gnu.gdb.aarch64_ilp32.core");
+  else
+    feature = tdesc_find_feature (tdesc, "org.gnu.gdb.aarch64.core");
 
   if (feature == NULL)
     return NULL;
@@ -2845,6 +2849,7 @@ _initialize_aarch64_tdep (void)
 		    aarch64_dump_tdep);
 
   initialize_tdesc_aarch64 ();
+  initialize_tdesc_aarch64_ilp32 ();
 
   /* Debug this file's internals.  */
   add_setshow_boolean_cmd ("aarch64", class_maintenance, &aarch64_debug, _("\
diff --git a/gdb/features/Makefile b/gdb/features/Makefile
index 809c81168c7..62a61f369b4 100644
--- a/gdb/features/Makefile
+++ b/gdb/features/Makefile
@@ -43,7 +43,7 @@
 #
 #   make GDB=/path/to/gdb XMLTOC="xml files" cfiles
 
-WHICH = aarch64 \
+WHICH = aarch64 aarch64_ilp32 \
 	arm-with-iwmmxt arm-with-vfpv2 arm-with-vfpv3 arm-with-neon \
 	i386/i386 i386/i386-linux \
 	i386/i386-mmx i386/i386-mmx-linux \
@@ -77,6 +77,7 @@ WHICH = aarch64 \
 
 # Record which registers should be sent to GDB by default after stop.
 aarch64-expedite = x29,sp,pc
+aarch64_ilp32-expedite = x29,sp,pc
 arm-expedite = r11,sp,pc
 i386/i386-expedite = ebp,esp,eip
 i386/i386-linux-expedite = ebp,esp,eip
@@ -148,6 +149,7 @@ OUTPUTS = $(patsubst %,$(outdir)/%.dat,$(WHICH))
 # to make on the command line.
 XMLTOC = \
 	aarch64.xml \
+	aarch64_ilp32.xml \
 	arm-with-iwmmxt.xml \
 	arm-with-m-fpa-layout.xml \
 	arm-with-m-vfp-d16.xml \
diff --git a/gdb/features/aarch64_ilp32-core.xml b/gdb/features/aarch64_ilp32-core.xml
new file mode 100644
index 00000000000..9b18fac2ff8
--- /dev/null
+++ b/gdb/features/aarch64_ilp32-core.xml
@@ -0,0 +1,67 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2009-2016 Free Software Foundation, Inc.
+     Contributed by ARM Ltd.
+
+     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.  -->
+
+<!DOCTYPE feature SYSTEM "gdb-target.dtd">
+<feature name="org.gnu.gdb.aarch64_ilp32.core">
+  <reg name="x0" bitsize="64"/>
+  <reg name="x1" bitsize="64"/>
+  <reg name="x2" bitsize="64"/>
+  <reg name="x3" bitsize="64"/>
+  <reg name="x4" bitsize="64"/>
+  <reg name="x5" bitsize="64"/>
+  <reg name="x6" bitsize="64"/>
+  <reg name="x7" bitsize="64"/>
+  <reg name="x8" bitsize="64"/>
+  <reg name="x9" bitsize="64"/>
+  <reg name="x10" bitsize="64"/>
+  <reg name="x11" bitsize="64"/>
+  <reg name="x12" bitsize="64"/>
+  <reg name="x13" bitsize="64"/>
+  <reg name="x14" bitsize="64"/>
+  <reg name="x15" bitsize="64"/>
+  <reg name="x16" bitsize="64"/>
+  <reg name="x17" bitsize="64"/>
+  <reg name="x18" bitsize="64"/>
+  <reg name="x19" bitsize="64"/>
+  <reg name="x20" bitsize="64"/>
+  <reg name="x21" bitsize="64"/>
+  <reg name="x22" bitsize="64"/>
+  <reg name="x23" bitsize="64"/>
+  <reg name="x24" bitsize="64"/>
+  <reg name="x25" bitsize="64"/>
+  <reg name="x26" bitsize="64"/>
+  <reg name="x27" bitsize="64"/>
+  <reg name="x28" bitsize="64"/>
+  <reg name="x29" bitsize="64"/>
+  <reg name="x30" bitsize="64"/>
+  <reg name="sp" bitsize="64" type="int64"/>
+
+  <reg name="pc" bitsize="64" type="uint64"/>
+
+  <flags id="cpsr_flags" size="4">
+    <field name="SP" start="0" type="bool"/>
+    <field name="" start="1" end="1"/>
+    <field name="EL" start="2" end="3"/>
+    <field name="nRW" start="4" type="bool"/>
+    <field name="" start="5" end="5"/>
+    <field name="F" start="6" type="bool"/>
+    <field name="I" start="7" type="bool"/>
+    <field name="A" start="8" type="bool"/>
+    <field name="D" start="9" type="bool"/>
+
+    <field name="IL" start="20" type="bool"/>
+    <field name="SS" start="21" type="bool"/>
+
+    <field name="V" start="28" type="bool"/>
+    <field name="C" start="29" type="bool"/>
+    <field name="Z" start="30" type="bool"/>
+    <field name="N" start="31" type="bool"/>
+  </flags>
+  <reg name="cpsr" bitsize="32" type="cpsr_flags"/>
+
+</feature>
diff --git a/gdb/features/aarch64_ilp32.c b/gdb/features/aarch64_ilp32.c
new file mode 100644
index 00000000000..095c2dcb607
--- /dev/null
+++ b/gdb/features/aarch64_ilp32.c
@@ -0,0 +1,191 @@
+/* THIS FILE IS GENERATED.  -*- buffer-read-only: t -*- vi:set ro:
+  Original: aarch64_ilp32.xml */
+
+#include "defs.h"
+#include "osabi.h"
+#include "target-descriptions.h"
+
+struct target_desc *tdesc_aarch64_ilp32;
+static void
+initialize_tdesc_aarch64_ilp32 (void)
+{
+  struct target_desc *result = allocate_target_description ();
+  struct tdesc_feature *feature;
+  struct tdesc_type *field_type;
+  struct tdesc_type *type;
+
+  set_tdesc_architecture (result, bfd_scan_arch ("aarch64:ilp32"));
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.aarch64_ilp32.core");
+  type = tdesc_create_flags (feature, "cpsr_flags", 4);
+  tdesc_add_flag (type, 0, "SP");
+  tdesc_add_bitfield (type, "", 1, 1);
+  tdesc_add_bitfield (type, "EL", 2, 3);
+  tdesc_add_flag (type, 4, "nRW");
+  tdesc_add_bitfield (type, "", 5, 5);
+  tdesc_add_flag (type, 6, "F");
+  tdesc_add_flag (type, 7, "I");
+  tdesc_add_flag (type, 8, "A");
+  tdesc_add_flag (type, 9, "D");
+  tdesc_add_flag (type, 20, "IL");
+  tdesc_add_flag (type, 21, "SS");
+  tdesc_add_flag (type, 28, "V");
+  tdesc_add_flag (type, 29, "C");
+  tdesc_add_flag (type, 30, "Z");
+  tdesc_add_flag (type, 31, "N");
+
+  tdesc_create_reg (feature, "x0", 0, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x1", 1, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x2", 2, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x3", 3, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x4", 4, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x5", 5, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x6", 6, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x7", 7, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x8", 8, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x9", 9, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x10", 10, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x11", 11, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x12", 12, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x13", 13, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x14", 14, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x15", 15, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x16", 16, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x17", 17, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x18", 18, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x19", 19, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x20", 20, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x21", 21, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x22", 22, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x23", 23, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x24", 24, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x25", 25, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x26", 26, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x27", 27, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x28", 28, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x29", 29, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "x30", 30, 1, NULL, 64, "int");
+  tdesc_create_reg (feature, "sp", 31, 1, NULL, 64, "int64");
+  tdesc_create_reg (feature, "pc", 32, 1, NULL, 64, "uint64");
+  tdesc_create_reg (feature, "cpsr", 33, 1, NULL, 32, "cpsr_flags");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.aarch64.fpu");
+  field_type = tdesc_named_type (feature, "ieee_double");
+  tdesc_create_vector (feature, "v2d", field_type, 2);
+
+  field_type = tdesc_named_type (feature, "uint64");
+  tdesc_create_vector (feature, "v2u", field_type, 2);
+
+  field_type = tdesc_named_type (feature, "int64");
+  tdesc_create_vector (feature, "v2i", field_type, 2);
+
+  field_type = tdesc_named_type (feature, "ieee_single");
+  tdesc_create_vector (feature, "v4f", field_type, 4);
+
+  field_type = tdesc_named_type (feature, "uint32");
+  tdesc_create_vector (feature, "v4u", field_type, 4);
+
+  field_type = tdesc_named_type (feature, "int32");
+  tdesc_create_vector (feature, "v4i", field_type, 4);
+
+  field_type = tdesc_named_type (feature, "uint16");
+  tdesc_create_vector (feature, "v8u", field_type, 8);
+
+  field_type = tdesc_named_type (feature, "int16");
+  tdesc_create_vector (feature, "v8i", field_type, 8);
+
+  field_type = tdesc_named_type (feature, "uint8");
+  tdesc_create_vector (feature, "v16u", field_type, 16);
+
+  field_type = tdesc_named_type (feature, "int8");
+  tdesc_create_vector (feature, "v16i", field_type, 16);
+
+  field_type = tdesc_named_type (feature, "uint128");
+  tdesc_create_vector (feature, "v1u", field_type, 1);
+
+  field_type = tdesc_named_type (feature, "int128");
+  tdesc_create_vector (feature, "v1i", field_type, 1);
+
+  type = tdesc_create_union (feature, "vnd");
+  field_type = tdesc_named_type (feature, "v2d");
+  tdesc_add_field (type, "f", field_type);
+  field_type = tdesc_named_type (feature, "v2u");
+  tdesc_add_field (type, "u", field_type);
+  field_type = tdesc_named_type (feature, "v2i");
+  tdesc_add_field (type, "s", field_type);
+
+  type = tdesc_create_union (feature, "vns");
+  field_type = tdesc_named_type (feature, "v4f");
+  tdesc_add_field (type, "f", field_type);
+  field_type = tdesc_named_type (feature, "v4u");
+  tdesc_add_field (type, "u", field_type);
+  field_type = tdesc_named_type (feature, "v4i");
+  tdesc_add_field (type, "s", field_type);
+
+  type = tdesc_create_union (feature, "vnh");
+  field_type = tdesc_named_type (feature, "v8u");
+  tdesc_add_field (type, "u", field_type);
+  field_type = tdesc_named_type (feature, "v8i");
+  tdesc_add_field (type, "s", field_type);
+
+  type = tdesc_create_union (feature, "vnb");
+  field_type = tdesc_named_type (feature, "v16u");
+  tdesc_add_field (type, "u", field_type);
+  field_type = tdesc_named_type (feature, "v16i");
+  tdesc_add_field (type, "s", field_type);
+
+  type = tdesc_create_union (feature, "vnq");
+  field_type = tdesc_named_type (feature, "v1u");
+  tdesc_add_field (type, "u", field_type);
+  field_type = tdesc_named_type (feature, "v1i");
+  tdesc_add_field (type, "s", field_type);
+
+  type = tdesc_create_union (feature, "aarch64v");
+  field_type = tdesc_named_type (feature, "vnd");
+  tdesc_add_field (type, "d", field_type);
+  field_type = tdesc_named_type (feature, "vns");
+  tdesc_add_field (type, "s", field_type);
+  field_type = tdesc_named_type (feature, "vnh");
+  tdesc_add_field (type, "h", field_type);
+  field_type = tdesc_named_type (feature, "vnb");
+  tdesc_add_field (type, "b", field_type);
+  field_type = tdesc_named_type (feature, "vnq");
+  tdesc_add_field (type, "q", field_type);
+
+  tdesc_create_reg (feature, "v0", 34, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v1", 35, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v2", 36, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v3", 37, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v4", 38, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v5", 39, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v6", 40, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v7", 41, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v8", 42, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v9", 43, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v10", 44, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v11", 45, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v12", 46, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v13", 47, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v14", 48, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v15", 49, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v16", 50, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v17", 51, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v18", 52, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v19", 53, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v20", 54, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v21", 55, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v22", 56, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v23", 57, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v24", 58, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v25", 59, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v26", 60, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v27", 61, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v28", 62, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v29", 63, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v30", 64, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "v31", 65, 1, NULL, 128, "aarch64v");
+  tdesc_create_reg (feature, "fpsr", 66, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "fpcr", 67, 1, NULL, 32, "int");
+
+  tdesc_aarch64_ilp32 = result;
+}
diff --git a/gdb/features/aarch64_ilp32.xml b/gdb/features/aarch64_ilp32.xml
new file mode 100644
index 00000000000..9c9b23a49ab
--- /dev/null
+++ b/gdb/features/aarch64_ilp32.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2009-2016 Free Software Foundation, Inc.
+     Contributed by ARM Ltd.
+
+     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.  -->
+
+<!DOCTYPE target SYSTEM "gdb-target.dtd">
+<target>
+  <architecture>aarch64:ilp32</architecture>
+  <xi:include href="aarch64_ilp32-core.xml"/>
+  <xi:include href="aarch64-fpu.xml"/>
+</target>
diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index 4dc2e451ea6..67a8503d034 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,22 @@
+2016-08-31  Andrew Pinski  <apinski@cavium.com>
+
+	* Makefile.in (clean): Remove aarch64_ilp32.c also.
+	(aarch64_ilp32-ipa.o): New target.
+	(aarch64_ilp32.c): New target.
+	* configure.srv (aarch64*-*-linux*): Add ilp32 files
+	to srv_regobj, srv_xmlfiles and ipa_obj.
+	* linux-aarch64-ipa.c (init_registers_aarch64_ilp32):
+	Declare.
+	(tdesc_aarch64_ilp32): Likewise.
+	(get_ipa_tdesc): Return tdesc_aarch64_ilp32 for ILP32.
+	(initialize_low_tracepoint): Call init_registers_aarch64_ilp32
+	for ILP32.
+	* linux-aarch64-low.c (init_registers_aarch64_ilp32): Declare.
+	(tdesc_aarch64_ilp32): Likewise.
+	(aarch64_linux_read_description): Return tdesc_aarch64_ilp32
+	for ILP32 executables.
+	(initialize_low_arch): Call init_registers_aarch64_ilp32.
+
 2016-08-31  Antoine Tremblay  <antoine.tremblay@ericsson.com>
 
 	* linux-low.c (linux_wait_1): Move event switch after unsuspend_lwps.
diff --git a/gdb/gdbserver/Makefile.in b/gdb/gdbserver/Makefile.in
index f844ab8853e..cd18f81a001 100644
--- a/gdb/gdbserver/Makefile.in
+++ b/gdb/gdbserver/Makefile.in
@@ -352,6 +352,7 @@ clean:
 	rm -f gdbserver$(EXEEXT) gdbreplay$(EXEEXT) core make.log
 	rm -f $(IPA_LIB)
 	rm -f aarch64.c
+	rm -f aarch64_ilp32.c
 	rm -f reg-arm.c reg-bfin.c i386.c reg-ia64.c reg-m32r.c reg-m68k.c
 	rm -f reg-sh.c reg-sparc.c reg-spu.c amd64.c i386-linux.c
 	rm -f reg-cris.c reg-crisv32.c amd64-linux.c reg-xtensa.c
@@ -540,6 +541,9 @@ linux-aarch64-ipa.o: linux-aarch64-ipa.c
 aarch64-ipa.o: aarch64.c
 	$(IPAGENT_COMPILE) $<
 	$(POSTCOMPILE)
+aarch64_ilp32-ipa.o: aarch64_ilp32.c
+	$(IPAGENT_COMPILE) $<
+	$(POSTCOMPILE)
 linux-s390-ipa.o: linux-s390-ipa.c
 	$(IPAGENT_COMPILE) $<
 	$(POSTCOMPILE)
@@ -800,6 +804,8 @@ aarch64-insn.o: ../arch/aarch64-insn.c
 
 aarch64.c : $(srcdir)/../regformats/aarch64.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/aarch64.dat aarch64.c
+aarch64_ilp32.c : $(srcdir)/../regformats/aarch64_ilp32.dat $(regdat_sh)
+	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/aarch64_ilp32.dat aarch64_ilp32.c
 reg-arm.c : $(srcdir)/../regformats/reg-arm.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-arm.dat reg-arm.c
 arm-with-iwmmxt.c : $(srcdir)/../regformats/arm-with-iwmmxt.dat $(regdat_sh)
diff --git a/gdb/gdbserver/configure.srv b/gdb/gdbserver/configure.srv
index 39e8392ac4f..54cbf4e5cc5 100644
--- a/gdb/gdbserver/configure.srv
+++ b/gdb/gdbserver/configure.srv
@@ -50,7 +50,7 @@ srv_linux_obj="linux-low.o linux-osdata.o linux-procfs.o linux-ptrace.o linux-wa
 
 case "${target}" in
   aarch64*-*-linux*)
-			srv_regobj="aarch64.o"
+			srv_regobj="aarch64.o aarch64_ilp32.o"
 			srv_regobj="${srv_regobj} arm-with-neon.o"
 			srv_tgtobj="linux-aarch64-low.o aarch64-linux-hw-point.o"
 			srv_tgtobj="$srv_tgtobj linux-aarch32-low.o"
@@ -58,14 +58,15 @@ case "${target}" in
 			srv_tgtobj="$srv_tgtobj aarch64-linux.o"
 			srv_tgtobj="$srv_tgtobj aarch64-insn.o"
 			srv_tgtobj="${srv_tgtobj} $srv_linux_obj"
-			srv_xmlfiles="aarch64.xml"
+			srv_xmlfiles="aarch64.xml aarch64_ilp32.xml"
 			srv_xmlfiles="${srv_xmlfiles} aarch64-core.xml"
+			srv_xmlfiles="${srv_xmlfiles} aarch64_ilp32-core.xml"
 			srv_xmlfiles="${srv_xmlfiles} aarch64-fpu.xml"
 			srv_xmlfiles="${srv_xmlfiles} arm-core.xml arm-vfpv3.xml"
 			srv_xmlfiles="${srv_xmlfiles} arm-with-neon.xml"
 			srv_linux_regsets=yes
 			srv_linux_thread_db=yes
-			ipa_obj="linux-aarch64-ipa.o aarch64-ipa.o"
+			ipa_obj="linux-aarch64-ipa.o aarch64-ipa.o aarch64_ilp32-ipa.o"
 			;;
   arm*-*-linux*)	srv_regobj="reg-arm.o arm-with-iwmmxt.o"
 			srv_regobj="${srv_regobj} arm-with-vfpv2.o"
diff --git a/gdb/gdbserver/linux-aarch64-ipa.c b/gdb/gdbserver/linux-aarch64-ipa.c
index 601d61c9699..d713bfa969a 100644
--- a/gdb/gdbserver/linux-aarch64-ipa.c
+++ b/gdb/gdbserver/linux-aarch64-ipa.c
@@ -29,6 +29,9 @@
 /* Defined in auto-generated file aarch64.c.  */
 void init_registers_aarch64 (void);
 extern const struct target_desc *tdesc_aarch64;
+/* Defined in auto-geenrated file aarch64_ilp32.c.  */
+void init_registers_aarch64_ilp32 (void);
+extern const struct target_desc *tdesc_aarch64_ilp32;
 
 /* Each register saved by the jump pad is in a 16 byte cell.  */
 #define FT_CR_SIZE 16
@@ -155,6 +158,9 @@ get_raw_reg (const unsigned char *raw_regs, int regnum)
 const struct target_desc *
 get_ipa_tdesc (int idx)
 {
+  if (sizeof (void*) == 4)
+    return tdesc_aarch64_ilp32;
+
   return tdesc_aarch64;
 }
 
@@ -207,5 +213,8 @@ alloc_jump_pad_buffer (size_t size)
 void
 initialize_low_tracepoint (void)
 {
-  init_registers_aarch64 ();
+  if (sizeof(void*) == 4)
+    init_registers_aarch64_ilp32 ();
+  else
+    init_registers_aarch64 ();
 }
diff --git a/gdb/gdbserver/linux-aarch64-low.c b/gdb/gdbserver/linux-aarch64-low.c
index e54a8ba9a80..79084efc30f 100644
--- a/gdb/gdbserver/linux-aarch64-low.c
+++ b/gdb/gdbserver/linux-aarch64-low.c
@@ -42,6 +42,8 @@
 /* Defined in auto-generated files.  */
 void init_registers_aarch64 (void);
 extern const struct target_desc *tdesc_aarch64;
+void init_registers_aarch64_ilp32 (void);
+extern const struct target_desc *tdesc_aarch64_ilp32;
 
 #ifdef HAVE_SYS_REG_H
 #include <sys/reg.h>
@@ -484,8 +486,13 @@ aarch64_linux_read_description (void)
 
   is_elf64 = linux_pid_exe_is_elf_64_file (tid, &machine);
 
-  if (is_elf64)
+  if (sizeof (void *) == 4 && is_elf64)
+    error (_("Can't debug 64-bit process with 32-bit GDBserver"));
+
+  if (machine == EM_AARCH64 && is_elf64)
     return tdesc_aarch64;
+  else if (machine == EM_AARCH64 && !is_elf64)
+    return tdesc_aarch64_ilp32;
   else
     return tdesc_arm_with_neon;
 }
@@ -3009,6 +3016,7 @@ void
 initialize_low_arch (void)
 {
   init_registers_aarch64 ();
+  init_registers_aarch64_ilp32 ();
 
   initialize_low_arch_aarch32 ();
 
diff --git a/gdb/regformats/aarch64_ilp32.dat b/gdb/regformats/aarch64_ilp32.dat
new file mode 100644
index 00000000000..bcef3e11f91
--- /dev/null
+++ b/gdb/regformats/aarch64_ilp32.dat
@@ -0,0 +1,73 @@
+# THIS FILE IS GENERATED.  -*- buffer-read-only: t -*- vi :set ro:
+# Generated from: aarch64_ilp32.xml
+name:aarch64_ilp32
+xmltarget:aarch64_ilp32.xml
+expedite:x29,sp,pc
+64:x0
+64:x1
+64:x2
+64:x3
+64:x4
+64:x5
+64:x6
+64:x7
+64:x8
+64:x9
+64:x10
+64:x11
+64:x12
+64:x13
+64:x14
+64:x15
+64:x16
+64:x17
+64:x18
+64:x19
+64:x20
+64:x21
+64:x22
+64:x23
+64:x24
+64:x25
+64:x26
+64:x27
+64:x28
+64:x29
+64:x30
+64:sp
+64:pc
+32:cpsr
+128:v0
+128:v1
+128:v2
+128:v3
+128:v4
+128:v5
+128:v6
+128:v7
+128:v8
+128:v9
+128:v10
+128:v11
+128:v12
+128:v13
+128:v14
+128:v15
+128:v16
+128:v17
+128:v18
+128:v19
+128:v20
+128:v21
+128:v22
+128:v23
+128:v24
+128:v25
+128:v26
+128:v27
+128:v28
+128:v29
+128:v30
+128:v31
+32:fpsr
+32:fpcr