1 files changed, 152 insertions, 0 deletions
diff --git a/gdb/gdbserver/win32-i386-low.c b/gdb/gdbserver/win32-i386-low.c
new file mode 100644
index 0000000..58ad787
--- /dev/null
+++ b/gdb/gdbserver/win32-i386-low.c
@@ -0,0 +1,152 @@
+/* Copyright (C) 2007 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
+
+#include "server.h"
+#include "win32-low.h"
+
+#define FCS_REGNUM 27
+#define FOP_REGNUM 31
+
+#define FLAG_TRACE_BIT 0x100
+
+static unsigned dr[8];
+
+static void
+initial_stuff (void)
+{
+  memset (&dr, 0, sizeof (dr));
+}
+
+static void
+store_debug_registers (win32_thread_info *th)
+{
+  dr[0] = th->context.Dr0;
+  dr[1] = th->context.Dr1;
+  dr[2] = th->context.Dr2;
+  dr[3] = th->context.Dr3;
+  dr[6] = th->context.Dr6;
+  dr[7] = th->context.Dr7;
+}
+
+static void
+load_debug_registers (win32_thread_info *th)
+{
+  th->context.Dr0 = dr[0];
+  th->context.Dr1 = dr[1];
+  th->context.Dr2 = dr[2];
+  th->context.Dr3 = dr[3];
+  /* th->context.Dr6 = dr[6];
+     FIXME: should we set dr6 also ?? */
+  th->context.Dr7 = dr[7];
+}
+
+/* Fetch register(s) from gdbserver regcache data.  */
+static void
+do_fetch_inferior_registers (win32_thread_info *th, int r)
+{
+  char *context_offset = regptr (&th->context, r);
+
+  long l;
+  if (r == FCS_REGNUM)
+    {
+      l = *((long *) context_offset) & 0xffff;
+      supply_register (r, (char *) &l);
+    }
+  else if (r == FOP_REGNUM)
+    {
+      l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1);
+      supply_register (r, (char *) &l);
+    }
+  else
+    supply_register (r, context_offset);
+}
+
+static void
+single_step (win32_thread_info *th)
+{
+  th->context.EFlags |= FLAG_TRACE_BIT;
+}
+
+/* An array of offset mappings into a Win32 Context structure.
+   This is a one-to-one mapping which is indexed by gdb's register
+   numbers.  It retrieves an offset into the context structure where
+   the 4 byte register is located.
+   An offset value of -1 indicates that Win32 does not provide this
+   register in it's CONTEXT structure.  In this case regptr will return
+   a pointer into a dummy register.  */
+#define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
+static const int mappings[] = {
+  context_offset (Eax),
+  context_offset (Ecx),
+  context_offset (Edx),
+  context_offset (Ebx),
+  context_offset (Esp),
+  context_offset (Ebp),
+  context_offset (Esi),
+  context_offset (Edi),
+  context_offset (Eip),
+  context_offset (EFlags),
+  context_offset (SegCs),
+  context_offset (SegSs),
+  context_offset (SegDs),
+  context_offset (SegEs),
+  context_offset (SegFs),
+  context_offset (SegGs),
+  context_offset (FloatSave.RegisterArea[0 * 10]),
+  context_offset (FloatSave.RegisterArea[1 * 10]),
+  context_offset (FloatSave.RegisterArea[2 * 10]),
+  context_offset (FloatSave.RegisterArea[3 * 10]),
+  context_offset (FloatSave.RegisterArea[4 * 10]),
+  context_offset (FloatSave.RegisterArea[5 * 10]),
+  context_offset (FloatSave.RegisterArea[6 * 10]),
+  context_offset (FloatSave.RegisterArea[7 * 10]),
+  context_offset (FloatSave.ControlWord),
+  context_offset (FloatSave.StatusWord),
+  context_offset (FloatSave.TagWord),
+  context_offset (FloatSave.ErrorSelector),
+  context_offset (FloatSave.ErrorOffset),
+  context_offset (FloatSave.DataSelector),
+  context_offset (FloatSave.DataOffset),
+  context_offset (FloatSave.ErrorSelector),
+  /* XMM0-7 */
+  context_offset (ExtendedRegisters[10 * 16]),
+  context_offset (ExtendedRegisters[11 * 16]),
+  context_offset (ExtendedRegisters[12 * 16]),
+  context_offset (ExtendedRegisters[13 * 16]),
+  context_offset (ExtendedRegisters[14 * 16]),
+  context_offset (ExtendedRegisters[15 * 16]),
+  context_offset (ExtendedRegisters[16 * 16]),
+  context_offset (ExtendedRegisters[17 * 16]),
+  /* MXCSR */
+  context_offset (ExtendedRegisters[24])
+};
+#undef context_offset
+
+struct win32_target_ops the_low_target = {
+  mappings,
+  sizeof (mappings) / sizeof (mappings[0]),
+  initial_stuff,
+  store_debug_registers,
+  load_debug_registers,
+  do_fetch_inferior_registers,
+  single_step,
+  (const char*)NULL, /* breakpoint */
+  0, /* breakpoint_len */
+  "i386" /* arch_string */
+};