[Qemu-devel] [PATCH] target-x86: Add GDB XML description for SSE registers

[Abdallah Bouassida]

[Qemu-devel] [PATCH] target-x86: Add GDB XML description for SSE registers

Add an XML description for SSE registers (XMM+MXCSR) for both X86
and X86-64 architectures in the GDB stub:
- configure: Define gdb_xml_files for the X86 targets (32 and 64bit).
- gdb-xml/i386-32bit-sse.xml & gdb-xml/i386-64bit-sse.xml: The XML files
that contain a description of the XMM + MXCSR registers.
- gdb-xml/i386-32bit.xml & gdb-xml/i386-64bit.xml: wrappers that include
the XML file of the core registers and the other XML file of the SSE 
registers.
- target/i386/cpu.c: Modify the gdb_core_xml_file to the new XML wrapper,
  modify the gdb_num_core_regs to fit the registers number defined in each
  XML file.

Signed-off-by: Abdallah Bouassida <address@hidden>
---
@Paolo: This patch is in response to your hints here:
https://lists.gnu.org/archive/html/qemu-devel/2017-03/msg03314.html
Thank you for pointing me on the missing registers!


 configure                  |  4 ++--
 gdb-xml/i386-32bit-sse.xml | 52 ++++++++++++++++++++++++++++++++++++++++
 gdb-xml/i386-32bit.xml     | 14 +++++++++++
 gdb-xml/i386-64bit-sse.xml | 60 
++++++++++++++++++++++++++++++++++++++++++++++
 gdb-xml/i386-64bit.xml     | 14 +++++++++++
 target/i386/cpu.c          |  8 +++----
 6 files changed, 146 insertions(+), 6 deletions(-)
 create mode 100644 gdb-xml/i386-32bit-sse.xml
 create mode 100644 gdb-xml/i386-32bit.xml
 create mode 100644 gdb-xml/i386-64bit-sse.xml
 create mode 100644 gdb-xml/i386-64bit.xml

diff --git a/configure b/configure
index 1a5ee4b..d4f154d 100755
--- a/configure
+++ b/configure
@@ -6044,11 +6044,11 @@ TARGET_ABI_DIR=""

 case "$target_name" in
   i386)
-    gdb_xml_files="i386-32bit-core.xml"
+    gdb_xml_files="i386-32bit.xml i386-32bit-core.xml i386-32bit-sse.xml"
   ;;
   x86_64)
     TARGET_BASE_ARCH=i386
-    gdb_xml_files="i386-64bit-core.xml"
+    gdb_xml_files="i386-64bit.xml i386-64bit-core.xml i386-64bit-sse.xml"
   ;;
   alpha)
     mttcg="yes"
diff --git a/gdb-xml/i386-32bit-sse.xml b/gdb-xml/i386-32bit-sse.xml
new file mode 100644
index 0000000..5767847
--- /dev/null
+++ b/gdb-xml/i386-32bit-sse.xml
@@ -0,0 +1,52 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2010-2017 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.i386.32bit.sse">
+  <vector id="v4f" type="ieee_single" count="4"/>
+  <vector id="v2d" type="ieee_double" count="2"/>
+  <vector id="v16i8" type="int8" count="16"/>
+  <vector id="v8i16" type="int16" count="8"/>
+  <vector id="v4i32" type="int32" count="4"/>
+  <vector id="v2i64" type="int64" count="2"/>
+  <union id="vec128">
+    <field name="v4_float" type="v4f"/>
+    <field name="v2_double" type="v2d"/>
+    <field name="v16_int8" type="v16i8"/>
+    <field name="v8_int16" type="v8i16"/>
+    <field name="v4_int32" type="v4i32"/>
+    <field name="v2_int64" type="v2i64"/>
+    <field name="uint128" type="uint128"/>
+  </union>
+  <flags id="i386_mxcsr" size="4">
+    <field name="IE" start="0" end="0"/>
+    <field name="DE" start="1" end="1"/>
+    <field name="ZE" start="2" end="2"/>
+    <field name="OE" start="3" end="3"/>
+    <field name="UE" start="4" end="4"/>
+    <field name="PE" start="5" end="5"/>
+    <field name="DAZ" start="6" end="6"/>
+    <field name="IM" start="7" end="7"/>
+    <field name="DM" start="8" end="8"/>
+    <field name="ZM" start="9" end="9"/>
+    <field name="OM" start="10" end="10"/>
+    <field name="UM" start="11" end="11"/>
+    <field name="PM" start="12" end="12"/>
+    <field name="FZ" start="15" end="15"/>
+  </flags>
+
+  <reg name="xmm0" bitsize="128" type="vec128" regnum="32"/>
+  <reg name="xmm1" bitsize="128" type="vec128"/>
+  <reg name="xmm2" bitsize="128" type="vec128"/>
+  <reg name="xmm3" bitsize="128" type="vec128"/>
+  <reg name="xmm4" bitsize="128" type="vec128"/>
+  <reg name="xmm5" bitsize="128" type="vec128"/>
+  <reg name="xmm6" bitsize="128" type="vec128"/>
+  <reg name="xmm7" bitsize="128" type="vec128"/>
+
+  <reg name="mxcsr" bitsize="32" type="i386_mxcsr" group="vector"/>
+</feature>
diff --git a/gdb-xml/i386-32bit.xml b/gdb-xml/i386-32bit.xml
new file mode 100644
index 0000000..956fc7f
--- /dev/null
+++ b/gdb-xml/i386-32bit.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2010-2017 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.  -->
+
+<!-- I386 with SSE -->
+
+<!DOCTYPE target SYSTEM "gdb-target.dtd">
+<feature name="org.gnu.gdb.i386.32bit">
+  <xi:include href="i386-32bit-core.xml"/>
+  <xi:include href="i386-32bit-sse.xml"/>
+</feature>
diff --git a/gdb-xml/i386-64bit-sse.xml b/gdb-xml/i386-64bit-sse.xml
new file mode 100644
index 0000000..e86efc9
--- /dev/null
+++ b/gdb-xml/i386-64bit-sse.xml
@@ -0,0 +1,60 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2010-2017 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.i386.64bit.sse">
+  <vector id="v4f" type="ieee_single" count="4"/>
+  <vector id="v2d" type="ieee_double" count="2"/>
+  <vector id="v16i8" type="int8" count="16"/>
+  <vector id="v8i16" type="int16" count="8"/>
+  <vector id="v4i32" type="int32" count="4"/>
+  <vector id="v2i64" type="int64" count="2"/>
+  <union id="vec128">
+    <field name="v4_float" type="v4f"/>
+    <field name="v2_double" type="v2d"/>
+    <field name="v16_int8" type="v16i8"/>
+    <field name="v8_int16" type="v8i16"/>
+    <field name="v4_int32" type="v4i32"/>
+    <field name="v2_int64" type="v2i64"/>
+    <field name="uint128" type="uint128"/>
+  </union>
+  <flags id="i386_mxcsr" size="4">
+    <field name="IE" start="0" end="0"/>
+    <field name="DE" start="1" end="1"/>
+    <field name="ZE" start="2" end="2"/>
+    <field name="OE" start="3" end="3"/>
+    <field name="UE" start="4" end="4"/>
+    <field name="PE" start="5" end="5"/>
+    <field name="DAZ" start="6" end="6"/>
+    <field name="IM" start="7" end="7"/>
+    <field name="DM" start="8" end="8"/>
+    <field name="ZM" start="9" end="9"/>
+    <field name="OM" start="10" end="10"/>
+    <field name="UM" start="11" end="11"/>
+    <field name="PM" start="12" end="12"/>
+    <field name="FZ" start="15" end="15"/>
+  </flags>
+
+  <reg name="xmm0" bitsize="128" type="vec128" regnum="40"/>
+  <reg name="xmm1" bitsize="128" type="vec128"/>
+  <reg name="xmm2" bitsize="128" type="vec128"/>
+  <reg name="xmm3" bitsize="128" type="vec128"/>
+  <reg name="xmm4" bitsize="128" type="vec128"/>
+  <reg name="xmm5" bitsize="128" type="vec128"/>
+  <reg name="xmm6" bitsize="128" type="vec128"/>
+  <reg name="xmm7" bitsize="128" type="vec128"/>
+  <reg name="xmm8" bitsize="128" type="vec128"/>
+  <reg name="xmm9" bitsize="128" type="vec128"/>
+  <reg name="xmm10" bitsize="128" type="vec128"/>
+  <reg name="xmm11" bitsize="128" type="vec128"/>
+  <reg name="xmm12" bitsize="128" type="vec128"/>
+  <reg name="xmm13" bitsize="128" type="vec128"/>
+  <reg name="xmm14" bitsize="128" type="vec128"/>
+  <reg name="xmm15" bitsize="128" type="vec128"/>
+
+  <reg name="mxcsr" bitsize="32" type="i386_mxcsr" group="vector"/>
+</feature>
diff --git a/gdb-xml/i386-64bit.xml b/gdb-xml/i386-64bit.xml
new file mode 100644
index 0000000..0b2f00c
--- /dev/null
+++ b/gdb-xml/i386-64bit.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2010-2017 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.  -->
+
+<!-- I386 64bit -->
+
+<!DOCTYPE target SYSTEM "gdb-target.dtd">
+<feature name="org.gnu.gdb.i386.64bit">
+  <xi:include href="i386-64bit-core.xml"/>
+  <xi:include href="i386-64bit-sse.xml"/>
+</feature>
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index a41d595..2e2661b 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -4063,11 +4063,11 @@ static void 
x86_cpu_common_class_init(ObjectClass *oc, void *data)
 #endif
     cc->gdb_arch_name = x86_gdb_arch_name;
 #ifdef TARGET_X86_64
-    cc->gdb_core_xml_file = "i386-64bit-core.xml";
-    cc->gdb_num_core_regs = 40;
+    cc->gdb_core_xml_file = "i386-64bit.xml";
+    cc->gdb_num_core_regs = 57;
 #else
-    cc->gdb_core_xml_file = "i386-32bit-core.xml";
-    cc->gdb_num_core_regs = 32;
+    cc->gdb_core_xml_file = "i386-32bit.xml";
+    cc->gdb_num_core_regs = 41;
 #endif
 #ifndef CONFIG_USER_ONLY
     cc->debug_excp_handler = breakpoint_handler;
--
1.9.1