2002-02-04 Pierre Muller <muller@ics.u-strasbg.fr>

	Add support for hardware watchpoints on win32 native.
	* win32-nat.c (CONTEXT_DEBUG_DR macro): Add use of
	CONTEXT_DEBUG_REGISTERS.
	(dr variable): New variable. Static array containing a local copy
	of debug registers.
	(debug_registers_changed): New variable.  Reflects when debug registers
	are changed and need to be written to inferior.
	(debug_registers_used): New variable. Reflects when any debug register
	was set, used when new threads are created.
	(cygwin_set_dr, cygwin_set_dr7, cygwin_get_dr6): New functions used by
	i386-nat code.
	(thread_rec): Set dr array if id is the thread of current_event .
	(child_continue, child_resume): Change the debug registers for all
	threads if debug_registers_changed.
	(child_add_thread): Change the debug registers if debug_registers_used.
	* config/i386/cygwin.mh: Add use of i386-nat.o file.
	Link nm.h to new nm-cygwin.h file.
	+ config/i386/nm-cygwin.h: New file. Contains the macros used for use
	of hardware registers.

2 files changed, 40 insertions, 2 deletions

diff --git a/gdb/config/i386/cygwin.mh b/gdb/config/i386/cygwin.mh
index 3680fc7..ce4656f 100644
--- a/gdb/config/i386/cygwin.mh
+++ b/gdb/config/i386/cygwin.mh
@@ -1,5 +1,5 @@
 MH_CFLAGS=
 XM_FILE=xm-cygwin.h
-NATDEPFILES= win32-nat.o corelow.o
-NAT_FILE=../none/nm-none.h
+NATDEPFILES= i386-nat.o win32-nat.o corelow.o
+NAT_FILE=nm-cygwin.h
 XM_CLIBS=
diff --git a/gdb/config/i386/nm-cygwin.h b/gdb/config/i386/nm-cygwin.h
new file mode 100644
index 0000000..b5e4890
--- /dev/null
+++ b/gdb/config/i386/nm-cygwin.h
@@ -0,0 +1,38 @@
+/* Native definitions for Intel x86 running CYGWIN.
+   Copyright (C) 2002 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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#define NO_PTRACE_H
+
+#define I386_USE_GENERIC_WATCHPOINTS
+
+#include "i386/nm-i386.h"
+
+/* Support for hardware-assisted breakpoints and watchpoints.  */
+
+#define I386_DR_LOW_SET_CONTROL(VAL)	cygwin_set_dr7 (VAL)
+extern void cygwin_set_dr7 (unsigned);
+
+#define I386_DR_LOW_SET_ADDR(N,ADDR)	cygwin_set_dr (N,ADDR)
+extern void cygwin_set_dr (int, CORE_ADDR);
+
+#define I386_DR_LOW_RESET_ADDR(N)
+
+#define I386_DR_LOW_GET_STATUS()	cygwin_get_dr6 ()
+extern unsigned cygwin_get_dr6 (void);