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[PATCH 02/24] Add MIPS32 FPU64 GDB target descriptions

From: Bhushan Attarde <bhushan dot attarde at imgtec dot com>
To: <gdb-patches at sourceware dot org>
Cc: <Maciej dot Rozycki at imgtec dot com>, <Matthew dot Fortune at imgtec dot com>, <James dot Hogan at imgtec dot com>, <Andrew dot Bennett at imgtec dot com>, <Jaydeep dot Patil at imgtec dot com>, Bhushan Attarde <bhushan dot attarde at imgtec dot com>
Date: Mon, 27 Jun 2016 20:19:29 +0530
Subject: [PATCH 02/24] Add MIPS32 FPU64 GDB target descriptions
Authentication-results: sourceware.org; auth=none
References: <1467038991-6600-1-git-send-email-bhushan dot attarde at imgtec dot com>
    Add a couple of new target descriptions for MIPS32 targets with 64-bit
    floating point registers, with and without DSP.

    These are identical to their 32-bit FPU counterparts except that the FP
    registers are 64-bits long to allow for debugging of F64=1 MIPS32 targets
    such as MIPS32r2 compatible cores, and they include the Config5 CP0
    register which has an FRE bit.

    F64 targets have an FR bit in the status register to specify the effective
    register size, and the FRE bit is used with FR=1 to enable a compatibility
    mode which is similar to FR=0 but with usable odd doubles which don't
    alias with any other FP registers.

    gdb/ChangeLog:

    	* features/Makefile (WHICH): Add mips-fpu64-linux and
    	mips-fpu64-dsp-linux and Sort microblaze out of the way
        of mips/mips64
    	(mips-fpu64-expedite): Set.
    	(mips-fpu64-dsp-expedite): Set.
    	* features/mips-fpu64-dsp-linux.xml: New file.
    	* features/mips-fpu64-linux.xml: New file.
    	* features/mips-fpu64.xml: New file.
    	* features/mips-fpu64-dsp-linux.c: New generated file.
    	* features/mips-fpu64-linux.c: New generated file.
    	* regformats/mips-fpu64-dsp-linux.dat: New generated file.
    	* regformats/mips-fpu64-linux.dat: New generated file.

    gdb/gdbserver/ChangeLog:

    	* Makefile.in (clean): Delete mips-fpu64-linux.c and
    	mips-fpu64-dsp-linux.c.
    	(mips-fpu64-linux.c): New rule.
    	(mips-fpu64-dsp-linux.c): New rule.
    	* configure.srv (srv_regobj): Add mips-fpu64-linux.o and
    	mips-fpu64-dsp-linux.o.
    	(srv_xmlfiles): Add mips-fpu64-linux.xml,
    	mips-fpu64-dsp-linux.xml, mips-cp0-fpu64.xml and mips-fpu64.xml.
---
 gdb/features/Makefile                   |   6 +-
 gdb/features/mips-fpu64-dsp-linux.c     | 111 ++++++++++++++++++++++++++++++++
 gdb/features/mips-fpu64-dsp-linux.xml   |  20 ++++++
 gdb/features/mips-fpu64-linux.c         | 102 +++++++++++++++++++++++++++++
 gdb/features/mips-fpu64-linux.xml       |  19 ++++++
 gdb/features/mips-fpu64.xml             |  45 +++++++++++++
 gdb/gdbserver/Makefile.in               |   7 +-
 gdb/gdbserver/configure.srv             |   5 ++
 gdb/regformats/mips-fpu64-dsp-linux.dat |  85 ++++++++++++++++++++++++
 gdb/regformats/mips-fpu64-linux.dat     |  78 ++++++++++++++++++++++
 10 files changed, 475 insertions(+), 3 deletions(-)
 create mode 100644 gdb/features/mips-fpu64-dsp-linux.c
 create mode 100644 gdb/features/mips-fpu64-dsp-linux.xml
 create mode 100644 gdb/features/mips-fpu64-linux.c
 create mode 100644 gdb/features/mips-fpu64-linux.xml
 create mode 100644 gdb/features/mips-fpu64.xml
 create mode 100644 gdb/regformats/mips-fpu64-dsp-linux.dat
 create mode 100644 gdb/regformats/mips-fpu64-linux.dat

diff --git a/gdb/features/Makefile b/gdb/features/Makefile
index 10173cf..b6baaf66 100644
--- a/gdb/features/Makefile
+++ b/gdb/features/Makefile
@@ -57,8 +57,8 @@ WHICH = aarch64 \
 	i386/x32 i386/x32-linux \
 	i386/x32-avx i386/x32-avx-linux \
 	i386/x32-avx512 i386/x32-avx512-linux \
-	mips-linux mips-dsp-linux \
 	microblaze-with-stack-protect \
+	mips-linux mips-dsp-linux mips-fpu64-linux mips-fpu64-dsp-linux \
 	mips64-linux mips64-dsp-linux \
 	nios2-linux \
 	rs6000/powerpc-32 \
@@ -100,11 +100,13 @@ i386/x32-avx-expedite = rbp,rsp,rip
 i386/x32-avx-linux-expedite = rbp,rsp,rip
 i386/x32-avx512-expedite = rbp,rsp,rip
 i386/x32-avx512-linux-expedite = rbp,rsp,rip
+microblaze-expedite = r1,rpc
 mips-expedite = r29,pc
 mips-dsp-expedite = r29,pc
+mips-fpu64-expedite = r29,pc
+mips-fpu64-dsp-expedite = r29,pc
 mips64-expedite = r29,pc
 mips64-dsp-expedite = r29,pc
-microblaze-expedite = r1,rpc
 nios2-linux-expedite = sp,pc
 powerpc-expedite = r1,pc
 rs6000/powerpc-cell32l-expedite = r1,pc,r0,orig_r3,r4
diff --git a/gdb/features/mips-fpu64-dsp-linux.c b/gdb/features/mips-fpu64-dsp-linux.c
new file mode 100644
index 0000000..c6dd7d0
--- /dev/null
+++ b/gdb/features/mips-fpu64-dsp-linux.c
@@ -0,0 +1,111 @@
+/* THIS FILE IS GENERATED.  -*- buffer-read-only: t -*- vi:set ro:
+  Original: mips-fpu64-dsp-linux.xml */
+
+#include "defs.h"
+#include "osabi.h"
+#include "target-descriptions.h"
+
+struct target_desc *tdesc_mips_fpu64_dsp_linux;
+static void
+initialize_tdesc_mips_fpu64_dsp_linux (void)
+{
+  struct target_desc *result = allocate_target_description ();
+  struct tdesc_feature *feature;
+
+  set_tdesc_architecture (result, bfd_scan_arch ("mips"));
+
+  set_tdesc_osabi (result, osabi_from_tdesc_string ("GNU/Linux"));
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.mips.cpu");
+  tdesc_create_reg (feature, "r0", 0, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r1", 1, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r2", 2, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r3", 3, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r4", 4, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r5", 5, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r6", 6, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r7", 7, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r8", 8, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r9", 9, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r10", 10, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r11", 11, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r12", 12, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r13", 13, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r14", 14, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r15", 15, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r16", 16, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r17", 17, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r18", 18, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r19", 19, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r20", 20, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r21", 21, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r22", 22, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r23", 23, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r24", 24, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r25", 25, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r26", 26, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r27", 27, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r28", 28, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r29", 29, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r30", 30, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r31", 31, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "lo", 33, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "hi", 34, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "pc", 37, 1, NULL, 32, "int");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.mips.cp0");
+  tdesc_create_reg (feature, "status", 32, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "badvaddr", 35, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "cause", 36, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "config5", 38, 1, NULL, 32, "int");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.mips.fpu");
+  tdesc_create_reg (feature, "f0", 39, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f1", 40, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f2", 41, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f3", 42, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f4", 43, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f5", 44, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f6", 45, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f7", 46, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f8", 47, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f9", 48, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f10", 49, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f11", 50, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f12", 51, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f13", 52, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f14", 53, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f15", 54, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f16", 55, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f17", 56, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f18", 57, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f19", 58, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f20", 59, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f21", 60, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f22", 61, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f23", 62, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f24", 63, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f25", 64, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f26", 65, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f27", 66, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f28", 67, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f29", 68, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f30", 69, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f31", 70, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "fcsr", 71, 1, "float", 32, "int");
+  tdesc_create_reg (feature, "fir", 72, 1, "float", 32, "int");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.mips.dsp");
+  tdesc_create_reg (feature, "hi1", 73, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "lo1", 74, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "hi2", 75, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "lo2", 76, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "hi3", 77, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "lo3", 78, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "dspctl", 79, 1, NULL, 32, "int");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.mips.linux");
+  tdesc_create_reg (feature, "restart", 80, 1, "system", 32, "int");
+
+  tdesc_mips_fpu64_dsp_linux = result;
+}
diff --git a/gdb/features/mips-fpu64-dsp-linux.xml b/gdb/features/mips-fpu64-dsp-linux.xml
new file mode 100644
index 0000000..f0de5ce
--- /dev/null
+++ b/gdb/features/mips-fpu64-dsp-linux.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2012-2013 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.  -->
+
+<!DOCTYPE target SYSTEM "gdb-target.dtd">
+<target>
+  <architecture>mips</architecture>
+  <osabi>GNU/Linux</osabi>
+  <xi:include href="mips-cpu.xml"/>
+  <xi:include href="mips-cp0.xml"/>
+  <xi:include href="mips-fpu64.xml"/>
+  <xi:include href="mips-dsp.xml"/>
+
+  <feature name="org.gnu.gdb.mips.linux">
+    <reg name="restart" bitsize="32" group="system"/>
+  </feature>
+</target>
diff --git a/gdb/features/mips-fpu64-linux.c b/gdb/features/mips-fpu64-linux.c
new file mode 100644
index 0000000..3fe4497
--- /dev/null
+++ b/gdb/features/mips-fpu64-linux.c
@@ -0,0 +1,102 @@
+/* THIS FILE IS GENERATED.  -*- buffer-read-only: t -*- vi:set ro:
+  Original: mips-fpu64-linux.xml */
+
+#include "defs.h"
+#include "osabi.h"
+#include "target-descriptions.h"
+
+struct target_desc *tdesc_mips_fpu64_linux;
+static void
+initialize_tdesc_mips_fpu64_linux (void)
+{
+  struct target_desc *result = allocate_target_description ();
+  struct tdesc_feature *feature;
+
+  set_tdesc_architecture (result, bfd_scan_arch ("mips"));
+
+  set_tdesc_osabi (result, osabi_from_tdesc_string ("GNU/Linux"));
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.mips.cpu");
+  tdesc_create_reg (feature, "r0", 0, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r1", 1, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r2", 2, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r3", 3, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r4", 4, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r5", 5, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r6", 6, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r7", 7, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r8", 8, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r9", 9, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r10", 10, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r11", 11, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r12", 12, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r13", 13, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r14", 14, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r15", 15, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r16", 16, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r17", 17, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r18", 18, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r19", 19, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r20", 20, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r21", 21, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r22", 22, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r23", 23, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r24", 24, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r25", 25, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r26", 26, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r27", 27, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r28", 28, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r29", 29, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r30", 30, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "r31", 31, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "lo", 33, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "hi", 34, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "pc", 37, 1, NULL, 32, "int");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.mips.cp0");
+  tdesc_create_reg (feature, "status", 32, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "badvaddr", 35, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "cause", 36, 1, NULL, 32, "int");
+  tdesc_create_reg (feature, "config5", 38, 1, NULL, 32, "int");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.mips.fpu");
+  tdesc_create_reg (feature, "f0", 39, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f1", 40, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f2", 41, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f3", 42, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f4", 43, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f5", 44, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f6", 45, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f7", 46, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f8", 47, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f9", 48, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f10", 49, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f11", 50, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f12", 51, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f13", 52, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f14", 53, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f15", 54, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f16", 55, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f17", 56, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f18", 57, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f19", 58, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f20", 59, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f21", 60, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f22", 61, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f23", 62, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f24", 63, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f25", 64, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f26", 65, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f27", 66, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f28", 67, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f29", 68, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f30", 69, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "f31", 70, 1, NULL, 64, "ieee_double");
+  tdesc_create_reg (feature, "fcsr", 71, 1, "float", 32, "int");
+  tdesc_create_reg (feature, "fir", 72, 1, "float", 32, "int");
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.mips.linux");
+  tdesc_create_reg (feature, "restart", 73, 1, "system", 32, "int");
+
+  tdesc_mips_fpu64_linux = result;
+}
diff --git a/gdb/features/mips-fpu64-linux.xml b/gdb/features/mips-fpu64-linux.xml
new file mode 100644
index 0000000..bc021c0
--- /dev/null
+++ b/gdb/features/mips-fpu64-linux.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2007-2013 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.  -->
+
+<!DOCTYPE target SYSTEM "gdb-target.dtd">
+<target>
+  <architecture>mips</architecture>
+  <osabi>GNU/Linux</osabi>
+  <xi:include href="mips-cpu.xml"/>
+  <xi:include href="mips-cp0.xml"/>
+  <xi:include href="mips-fpu64.xml"/>
+
+  <feature name="org.gnu.gdb.mips.linux">
+    <reg name="restart" bitsize="32" group="system"/>
+  </feature>
+</target>
diff --git a/gdb/features/mips-fpu64.xml b/gdb/features/mips-fpu64.xml
new file mode 100644
index 0000000..88dc9d9
--- /dev/null
+++ b/gdb/features/mips-fpu64.xml
@@ -0,0 +1,45 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2007-2013 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.  -->
+
+<!DOCTYPE feature SYSTEM "gdb-target.dtd">
+<feature name="org.gnu.gdb.mips.fpu">
+  <reg name="f0" bitsize="64" type="ieee_double"/>
+  <reg name="f1" bitsize="64" type="ieee_double"/>
+  <reg name="f2" bitsize="64" type="ieee_double"/>
+  <reg name="f3" bitsize="64" type="ieee_double"/>
+  <reg name="f4" bitsize="64" type="ieee_double"/>
+  <reg name="f5" bitsize="64" type="ieee_double"/>
+  <reg name="f6" bitsize="64" type="ieee_double"/>
+  <reg name="f7" bitsize="64" type="ieee_double"/>
+  <reg name="f8" bitsize="64" type="ieee_double"/>
+  <reg name="f9" bitsize="64" type="ieee_double"/>
+  <reg name="f10" bitsize="64" type="ieee_double"/>
+  <reg name="f11" bitsize="64" type="ieee_double"/>
+  <reg name="f12" bitsize="64" type="ieee_double"/>
+  <reg name="f13" bitsize="64" type="ieee_double"/>
+  <reg name="f14" bitsize="64" type="ieee_double"/>
+  <reg name="f15" bitsize="64" type="ieee_double"/>
+  <reg name="f16" bitsize="64" type="ieee_double"/>
+  <reg name="f17" bitsize="64" type="ieee_double"/>
+  <reg name="f18" bitsize="64" type="ieee_double"/>
+  <reg name="f19" bitsize="64" type="ieee_double"/>
+  <reg name="f20" bitsize="64" type="ieee_double"/>
+  <reg name="f21" bitsize="64" type="ieee_double"/>
+  <reg name="f22" bitsize="64" type="ieee_double"/>
+  <reg name="f23" bitsize="64" type="ieee_double"/>
+  <reg name="f24" bitsize="64" type="ieee_double"/>
+  <reg name="f25" bitsize="64" type="ieee_double"/>
+  <reg name="f26" bitsize="64" type="ieee_double"/>
+  <reg name="f27" bitsize="64" type="ieee_double"/>
+  <reg name="f28" bitsize="64" type="ieee_double"/>
+  <reg name="f29" bitsize="64" type="ieee_double"/>
+  <reg name="f30" bitsize="64" type="ieee_double"/>
+  <reg name="f31" bitsize="64" type="ieee_double"/>
+
+  <reg name="fcsr" bitsize="32" group="float"/>
+  <reg name="fir" bitsize="32" group="float"/>
+</feature>
diff --git a/gdb/gdbserver/Makefile.in b/gdb/gdbserver/Makefile.in
index 1e874e3..9913d6a 100644
--- a/gdb/gdbserver/Makefile.in
+++ b/gdb/gdbserver/Makefile.in
@@ -357,7 +357,8 @@ clean:
 	rm -f reg-tilegx.c reg-tilegx32.c
 	rm -f arm-with-iwmmxt.c
 	rm -f arm-with-vfpv2.c arm-with-vfpv3.c arm-with-neon.c
-	rm -f mips-linux.c mips-dsp-linux.c
+	rm -f mips-linux.c mips-dsp-linux.c mips-fpu64-linux.c
+	rm -f mips-fpu64-dsp-linux.c
 	rm -f mips64-linux.c mips64-dsp-linux.c
 	rm -f nios2-linux.c
 	rm -f powerpc-32.c powerpc-32l.c powerpc-64l.c powerpc-e500l.c
@@ -710,6 +711,10 @@ mips-linux.c : $(srcdir)/../regformats/mips-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/mips-linux.dat mips-linux.c
 mips-dsp-linux.c : $(srcdir)/../regformats/mips-dsp-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/mips-dsp-linux.dat mips-dsp-linux.c
+mips-fpu64-linux.c : $(srcdir)/../regformats/mips-fpu64-linux.dat $(regdat_sh)
+	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/mips-fpu64-linux.dat mips-fpu64-linux.c
+mips-fpu64-dsp-linux.c : $(srcdir)/../regformats/mips-fpu64-dsp-linux.dat $(regdat_sh)
+	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/mips-fpu64-dsp-linux.dat mips-fpu64-dsp-linux.c
 mips64-linux.c : $(srcdir)/../regformats/mips64-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/mips64-linux.dat mips64-linux.c
 mips64-dsp-linux.c : $(srcdir)/../regformats/mips64-dsp-linux.dat $(regdat_sh)
diff --git a/gdb/gdbserver/configure.srv b/gdb/gdbserver/configure.srv
index a54b9e7..422fd90 100644
--- a/gdb/gdbserver/configure.srv
+++ b/gdb/gdbserver/configure.srv
@@ -187,15 +187,20 @@ case "${target}" in
 			;;
   mips*-*-linux*)	srv_regobj="mips-linux.o"
 			srv_regobj="${srv_regobj} mips-dsp-linux.o"
+			srv_regobj="${srv_regobj} mips-fpu64-linux.o"
+			srv_regobj="${srv_regobj} mips-fpu64-dsp-linux.o"
 			srv_regobj="${srv_regobj} mips64-linux.o"
 			srv_regobj="${srv_regobj} mips64-dsp-linux.o"
 			srv_tgtobj="$srv_linux_obj linux-mips-low.o"
 			srv_tgtobj="${srv_tgtobj} mips-linux-watch.o"
 			srv_xmlfiles="mips-linux.xml"
 			srv_xmlfiles="${srv_xmlfiles} mips-dsp-linux.xml"
+			srv_xmlfiles="${srv_xmlfiles} mips-fpu64-linux.xml"
+			srv_xmlfiles="${srv_xmlfiles} mips-fpu64-dsp-linux.xml"
 			srv_xmlfiles="${srv_xmlfiles} mips-cpu.xml"
 			srv_xmlfiles="${srv_xmlfiles} mips-cp0.xml"
 			srv_xmlfiles="${srv_xmlfiles} mips-fpu.xml"
+			srv_xmlfiles="${srv_xmlfiles} mips-fpu64.xml"
 			srv_xmlfiles="${srv_xmlfiles} mips-dsp.xml"
 			srv_xmlfiles="${srv_xmlfiles} mips64-linux.xml"
 			srv_xmlfiles="${srv_xmlfiles} mips64-dsp-linux.xml"
diff --git a/gdb/regformats/mips-fpu64-dsp-linux.dat b/gdb/regformats/mips-fpu64-dsp-linux.dat
new file mode 100644
index 0000000..0eac27f
--- /dev/null
+++ b/gdb/regformats/mips-fpu64-dsp-linux.dat
@@ -0,0 +1,85 @@
+# DO NOT EDIT: generated from mips-fpu64-dsp-linux.xml
+name:mips_fpu64_dsp_linux
+xmltarget:mips-fpu64-dsp-linux.xml
+expedite:r29,pc
+32:r0
+32:r1
+32:r2
+32:r3
+32:r4
+32:r5
+32:r6
+32:r7
+32:r8
+32:r9
+32:r10
+32:r11
+32:r12
+32:r13
+32:r14
+32:r15
+32:r16
+32:r17
+32:r18
+32:r19
+32:r20
+32:r21
+32:r22
+32:r23
+32:r24
+32:r25
+32:r26
+32:r27
+32:r28
+32:r29
+32:r30
+32:r31
+32:status
+32:lo
+32:hi
+32:badvaddr
+32:cause
+32:pc
+32:config5
+64:f0
+64:f1
+64:f2
+64:f3
+64:f4
+64:f5
+64:f6
+64:f7
+64:f8
+64:f9
+64:f10
+64:f11
+64:f12
+64:f13
+64:f14
+64:f15
+64:f16
+64:f17
+64:f18
+64:f19
+64:f20
+64:f21
+64:f22
+64:f23
+64:f24
+64:f25
+64:f26
+64:f27
+64:f28
+64:f29
+64:f30
+64:f31
+32:fcsr
+32:fir
+32:hi1
+32:lo1
+32:hi2
+32:lo2
+32:hi3
+32:lo3
+32:dspctl
+32:restart
diff --git a/gdb/regformats/mips-fpu64-linux.dat b/gdb/regformats/mips-fpu64-linux.dat
new file mode 100644
index 0000000..ad6c3c6
--- /dev/null
+++ b/gdb/regformats/mips-fpu64-linux.dat
@@ -0,0 +1,78 @@
+# DO NOT EDIT: generated from mips-fpu64-linux.xml
+name:mips_fpu64_linux
+xmltarget:mips-fpu64-linux.xml
+expedite:r29,pc
+32:r0
+32:r1
+32:r2
+32:r3
+32:r4
+32:r5
+32:r6
+32:r7
+32:r8
+32:r9
+32:r10
+32:r11
+32:r12
+32:r13
+32:r14
+32:r15
+32:r16
+32:r17
+32:r18
+32:r19
+32:r20
+32:r21
+32:r22
+32:r23
+32:r24
+32:r25
+32:r26
+32:r27
+32:r28
+32:r29
+32:r30
+32:r31
+32:status
+32:lo
+32:hi
+32:badvaddr
+32:cause
+32:pc
+32:config5
+64:f0
+64:f1
+64:f2
+64:f3
+64:f4
+64:f5
+64:f6
+64:f7
+64:f8
+64:f9
+64:f10
+64:f11
+64:f12
+64:f13
+64:f14
+64:f15
+64:f16
+64:f17
+64:f18
+64:f19
+64:f20
+64:f21
+64:f22
+64:f23
+64:f24
+64:f25
+64:f26
+64:f27
+64:f28
+64:f29
+64:f30
+64:f31
+32:fcsr
+32:fir
+32:restart
-- 
1.9-rc2
References:
- [PATCH 01/24] MIPS: Handle run-time reconfigurable FPR size
  - From: Bhushan Attarde
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