2002-06-07 Michal Ludvig <mludvig@suse.cz>

	* x86-64-linux-nat.c (x86_64_fxsave_offset): New.
	(supply_fpregset, fill_fpregset): Don't call i387_*_fxsave,
	better do the things actually here.
	* x86-64-tdep.c (x86_64_register_name2nr): New.
	(x86_64_register_name): Renamed to x86_64_register_nr2name.
	(x86_64_gdbarch_init): Respect the above change.
	* x86-64-tdep.h (x86_64_register_name2nr)
	(x86_64_register_nr2name): Add prototypes.
	* config/i386/x86-64linux.mt (TDEPFILES): Remove i387-tdep.o.

1 files changed, 59 insertions, 10 deletions

diff --git a/gdb/x86-64-linux-nat.c b/gdb/x86-64-linux-nat.c
index f57a5f27675..4c4f64382c4 100644
--- a/gdb/x86-64-linux-nat.c
+++ b/gdb/x86-64-linux-nat.c
@@ -25,7 +25,6 @@
 #include "inferior.h"
 #include "gdbcore.h"
 #include "regcache.h"
-#include "i387-tdep.h"
 #include "gdb_assert.h"
 #include "x86-64-tdep.h"
 
@@ -195,23 +194,73 @@ store_regs (int tid, int regno)
 
 /* Transfering floating-point registers between GDB, inferiors and cores.  */
 
-/* Fill GDB's register array with the floating-point register values in
-   *FPREGSETP.  */
+static void *
+x86_64_fxsave_offset (elf_fpregset_t * fxsave, int regnum)
+{
+  char *reg_name;
+  int reg_index;
+
+  gdb_assert (x86_64_num_gregs - 1 < regnum && regnum < x86_64_num_regs);
+
+  reg_name = x86_64_register_nr2name (regnum);
+
+  if (reg_name[0] == 's' && reg_name[1] == 't')
+    {
+      reg_index = reg_name[2] - '0';
+      return &fxsave->st_space[reg_index * 2];
+    }
+
+  if (reg_name[0] == 'x' && reg_name[1] == 'm' && reg_name[2] == 'm')
+    {
+      reg_index = reg_name[3] - '0';
+      return &fxsave->xmm_space[reg_index * 4];
+    }
+
+  if (strcmp (reg_name, "mxcsr") == 0)
+    return &fxsave->mxcsr;
+
+  return NULL;
+}
+
+/* Fill GDB's register array with the floating-point and SSE register
+   values in *FXSAVE.  This function masks off any of the reserved
+   bits in *FXSAVE.  */
 
 void
-supply_fpregset (elf_fpregset_t * fpregsetp)
+supply_fpregset (elf_fpregset_t * fxsave)
 {
-  i387_supply_fxsave ((char *) fpregsetp);
+  int i, reg_st0, reg_mxcsr;
+
+  reg_st0 = x86_64_register_name2nr ("st0");
+  reg_mxcsr = x86_64_register_name2nr ("mxcsr");
+
+  gdb_assert (reg_st0 > 0 && reg_mxcsr > reg_st0);
+
+  for (i = reg_st0; i <= reg_mxcsr; i++)
+    supply_register (i, x86_64_fxsave_offset (fxsave, i));
 }
 
-/* Fill register REGNO (if it is a floating-point register) in
-   *FPREGSETP with the value in GDB's register array.  If REGNO is -1,
-   do this for all registers.  */
+/* Fill register REGNUM (if it is a floating-point or SSE register) in
+   *FXSAVE with the value in GDB's register array.  If REGNUM is -1, do
+   this for all registers.  This function doesn't touch any of the
+   reserved bits in *FXSAVE.  */
 
 void
-fill_fpregset (elf_fpregset_t * fpregsetp, int regno)
+fill_fpregset (elf_fpregset_t * fxsave, int regnum)
 {
-  i387_fill_fxsave ((char *) fpregsetp, regno);
+  int i, last_regnum = MXCSR_REGNUM;
+  void *ptr;
+
+  if (gdbarch_tdep (current_gdbarch)->num_xmm_regs == 0)
+    last_regnum = FOP_REGNUM;
+
+  for (i = FP0_REGNUM; i <= last_regnum; i++)
+    if (regnum == -1 || regnum == i)
+      {
+	ptr = x86_64_fxsave_offset (fxsave, i);
+	if (ptr)
+	  regcache_collect (i, ptr);
+      }
 }
 
 /* Fetch all floating-point registers from process/thread TID and store