Support i386 without SSE.

gdb/

2010-04-08  H.J. Lu  <hongjiu.lu@intel.com>

	* i386-linux-nat.c (have_ptrace_getfpxregs): Initialize to -1
	if HAVE_PTRACE_GETFPXREGS is defined.
	(i386_linux_read_description): Set have_ptrace_getfpxregs and
	have_ptrace_getregset to 0 if ptrace PTRACE_GETFPXREGS failed.

	* i386-linux-tdep.c: Include "features/i386/i386-mmx-linux.c"
	(i386_linux_core_read_description): Return tdesc_i386_mmx_linux
	if .reg-xfp section doesn't exist.
	(_initialize_i386_linux_tdep): Call initialize_tdesc_i386_mmx_linux.

	* i386-linux-tdep.h (tdesc_i386_mmx_linux): New.

	* i386-tdep.c: Include "features/i386/i386-mmx.c".
	(i386_go32_init_abi): Set tdesc to tdesc_i386_mmx.
	(i386_validate_tdesc_p): Make org.gnu.gdb.i386.sse optional.  Set
	xcr0 to I386_XSTATE_X87_MASK if SSE isn't available.
	(i386_gdbarch_init): Update comments.
	(_initialize_i386_tdep): Call initialize_tdesc_i386_mmx.

	* common/i386-xstate.h (I386_XSTATE_X87_MASK): New.

	* config/djgpp/fnchange.lst: Add i386 MMX XML files.

	* features/Makefile (i386/i386-mmx-expedite): New.
	(i386/i386-mmx-linux-expedite): Likewise.
	($(outdir)/i386/i386-mmx.dat): Likewise.
	($(outdir)/i386/i386-mmx-linux.dat): Likewise.

	* features/i386/i386-mmx-linux.c: New.
	* features/i386/i386-mmx-linux.xml: Likewise.
	* features/i386/i386-mmx.c: Likewise.
	* features/i386/i386-mmx.xml: Likewise.
	* regformats/i386/i386-mmx-linux.dat: Likewise.
	* regformats/i386/i386-mmx.dat: Likewise.

	* features/Makefile (WHICH): Add i386/i386-mmx and
	i386/i386-mmx-linux.

gdb/doc/

2010-04-08  H.J. Lu  <hongjiu.lu@intel.com>

	* gdb.texinfo (i386 Features): Make org.gnu.gdb.i386.avx
	optional.  Make org.gnu.gdb.i386.avx requires
	org.gnu.gdb.i386.avx.

gdb/gdbserver/

2010-04-08  H.J. Lu  <hongjiu.lu@intel.com>

	* Makefile.in (clean): Also remove i386-mmx.c i386-mmx-linux.c.
	(i386-mmx.o): New.
	(i386-mmx.c): Likewise.
	(i386-mmx-linux.o): Likewise.
	(i386-mmx-linux.c): Likewise.

	* configure.srv (srv_i386_regobj): Add i386-mmx.o.
	(srv_i386_linux_regobj): Add i386-mmx-linux.o.
	(srv_i386_xmlfiles): Add i386/i386-mmx.xml.
	(srv_i386_linux_xmlfiles): Add i386/i386-mmx-linux.xml.

	* linux-x86-low.c (init_registers_i386_mmx_linux): New.
	(x86_linux_update_xmltarget): Call init_registers_i386_mmx_linux
	and return if ptrace PTRACE_GETFPXREGS failed in 32bit.

4 files changed, 68 insertions, 7 deletions

diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index 8a26b27..e9324d1 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,20 @@
+2010-04-08  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* Makefile.in (clean): Also remove i386-mmx.c i386-mmx-linux.c.
+	(i386-mmx.o): New.
+	(i386-mmx.c): Likewise.
+	(i386-mmx-linux.o): Likewise.
+	(i386-mmx-linux.c): Likewise.
+
+	* configure.srv (srv_i386_regobj): Add i386-mmx.o.
+	(srv_i386_linux_regobj): Add i386-mmx-linux.o.
+	(srv_i386_xmlfiles): Add i386/i386-mmx.xml.
+	(srv_i386_linux_xmlfiles): Add i386/i386-mmx-linux.xml.
+
+	* linux-x86-low.c (init_registers_i386_mmx_linux): New.
+	(x86_linux_update_xmltarget): Call init_registers_i386_mmx_linux
+	and return if ptrace PTRACE_GETFPXREGS failed in 32bit.
+
 2010-04-07  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* Makefile.in (clean): Updated.
diff --git a/gdb/gdbserver/Makefile.in b/gdb/gdbserver/Makefile.in
index 2ec9784..a95837a 100644
--- a/gdb/gdbserver/Makefile.in
+++ b/gdb/gdbserver/Makefile.in
@@ -219,6 +219,7 @@ clean:
 	rm -f xml-builtin.c stamp-xml
 	rm -f i386-avx.c i386-avx-linux.c
 	rm -f amd64-avx.c amd64-avx-linux.c
+	rm -f i386-mmx.c i386-mmx-linux.c
 
 maintainer-clean realclean distclean: clean
 	rm -f nm.h tm.h xm.h config.status config.h stamp-h config.log
@@ -359,6 +360,12 @@ i386-avx.c : $(srcdir)/../regformats/i386/i386-avx.dat $(regdat_sh)
 i386-avx-linux.o : i386-avx-linux.c $(regdef_h)
 i386-avx-linux.c : $(srcdir)/../regformats/i386/i386-avx-linux.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/i386-avx-linux.dat i386-avx-linux.c
+i386-mmx.o : i386-mmx.c $(regdef_h)
+i386-mmx.c : $(srcdir)/../regformats/i386/i386-mmx.dat $(regdat_sh)
+	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/i386-mmx.dat i386-mmx.c
+i386-mmx-linux.o : i386-mmx-linux.c $(regdef_h)
+i386-mmx-linux.c : $(srcdir)/../regformats/i386/i386-mmx-linux.dat $(regdat_sh)
+	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/i386/i386-mmx-linux.dat i386-mmx-linux.c
 reg-ia64.o : reg-ia64.c $(regdef_h)
 reg-ia64.c : $(srcdir)/../regformats/reg-ia64.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-ia64.dat reg-ia64.c
diff --git a/gdb/gdbserver/configure.srv b/gdb/gdbserver/configure.srv
index 8bc9aeb..803d3f4 100644
--- a/gdb/gdbserver/configure.srv
+++ b/gdb/gdbserver/configure.srv
@@ -22,16 +22,16 @@
 # Default hostio_last_error implementation
 srv_hostio_err_objs="hostio-errno.o"
 
-srv_i386_regobj="i386.o i386-avx.o"
-srv_i386_linux_regobj="i386-linux.o i386-avx-linux.o"
+srv_i386_regobj="i386.o i386-avx.o i386-mmx.o"
+srv_i386_linux_regobj="i386-linux.o i386-avx-linux.o i386-mmx-linux.o"
 srv_amd64_regobj="amd64.o x86-64-avx.o"
 srv_amd64_linux_regobj="amd64-linux.o amd64-avx-linux.o"
 
 srv_i386_32bit_xmlfiles="i386/32bit-core.xml i386/32bit-sse.xml i386/32bit-avx.xml"
 srv_i386_64bit_xmlfiles="i386/64bit-core.xml i386/64bit-sse.xml i386/64bit-avx.xml"
-srv_i386_xmlfiles="i386/i386.xml i386/i386-avx.xml $srv_i386_32bit_xmlfiles"
+srv_i386_xmlfiles="i386/i386.xml i386/i386-avx.xml i386/i386-mmx.xml $srv_i386_32bit_xmlfiles"
 srv_amd64_xmlfiles="i386/amd64.xml i386/amd64-avx.xml $srv_i386_64bit_xmlfiles"
-srv_i386_linux_xmlfiles="i386/i386-linux.xml i386/i386-avx-linux.xml i386/32bit-linux.xml $srv_i386_32bit_xmlfiles"
+srv_i386_linux_xmlfiles="i386/i386-linux.xml i386/i386-avx-linux.xml i386/i386-mmx-linux.xml i386/32bit-linux.xml $srv_i386_32bit_xmlfiles"
 srv_amd64_linux_xmlfiles="i386/amd64-linux.xml i386/amd64-avx-linux.xml i386/64bit-linux.xml $srv_i386_64bit_xmlfiles"
 
 # Input is taken from the "${target}" variable.
diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c
index 3853b25..9754c1e 100644
--- a/gdb/gdbserver/linux-x86-low.c
+++ b/gdb/gdbserver/linux-x86-low.c
@@ -37,6 +37,8 @@ void init_registers_amd64_linux (void);
 void init_registers_i386_avx_linux (void);
 /* Defined in auto-generated file amd64-avx-linux.c.  */
 void init_registers_amd64_avx_linux (void);
+/* Defined in auto-generated file i386-mmx-linux.c.  */
+void init_registers_i386_mmx_linux (void);
 
 /* Backward compatibility for gdb without XML support.  */
 
@@ -828,19 +830,56 @@ static int use_xml;
 static void
 x86_linux_update_xmltarget (void)
 {
+  int pid;
+  struct regset_info *regset;
   static unsigned long long xcr0;
   static int have_ptrace_getregset = -1;
+#ifdef HAVE_PTRACE_GETFPXREGS
+  static int have_ptrace_getfpxregs = -1;
+#endif
 
   if (!current_inferior)
     return;
 
+  pid = pid_of (get_thread_lwp (current_inferior));
 #ifdef __x86_64__
   if (num_xmm_registers == 8)
     init_registers_i386_linux ();
   else
     init_registers_amd64_linux ();
 #else
-  init_registers_i386_linux ();
+    {
+# ifdef HAVE_PTRACE_GETFPXREGS
+      if (have_ptrace_getfpxregs == -1)
+	{
+	  elf_fpxregset_t fpxregs;
+
+	  if (ptrace (PTRACE_GETFPXREGS, pid, 0, (int) &fpxregs) < 0)
+	    {
+	      have_ptrace_getfpxregs = 0;
+	      x86_xcr0 = I386_XSTATE_X87_MASK;
+
+	      /* Disable PTRACE_GETFPXREGS.  */
+	      for (regset = target_regsets;
+		   regset->fill_function != NULL; regset++)
+		if (regset->get_request == PTRACE_GETFPXREGS)
+		  {
+		    regset->size = 0;
+		    break;
+		  }
+	    }
+	  else
+	    have_ptrace_getfpxregs = 1;
+	}
+
+      if (!have_ptrace_getfpxregs)
+	{
+	  init_registers_i386_mmx_linux ();
+	  return;
+	}
+# endif
+      init_registers_i386_linux ();
+    }
 #endif
 
   if (!use_xml)
@@ -863,10 +902,8 @@ x86_linux_update_xmltarget (void)
   /* Check if XSAVE extended state is supported.  */
   if (have_ptrace_getregset == -1)
     {
-      int pid = pid_of (get_thread_lwp (current_inferior));
       unsigned long long xstateregs[I386_XSTATE_SSE_SIZE / sizeof (long long)];
       struct iovec iov;
-      struct regset_info *regset;
 
       iov.iov_base = xstateregs;
       iov.iov_len = sizeof (xstateregs);