Introduce the GDB debugger backend for the new KDB framework. The

backend improves over the old GDB support in the following ways:
o  Unified implementation with minimal MD code.
o  A simple interface for devices to register themselves as debug
   ports, ala consoles.
o  Compression by using run-length encoding.
o  Implements GDB threading support.

1 files changed, 57 insertions, 0 deletions

diff --git a/sys/amd64/include/gdb_machdep.h b/sys/amd64/include/gdb_machdep.h
new file mode 100644
index 0000000..458f2f6
--- /dev/null
+++ b/sys/amd64/include/gdb_machdep.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2004 Marcel Moolenaar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _MACHINE_GDB_MACHDEP_H_
+#define	_MACHINE_GDB_MACHDEP_H_
+
+#define	GDB_BUFSZ	500
+#define	GDB_NREGS	56
+#define	GDB_REG_PC	18
+
+static __inline size_t
+gdb_cpu_regsz(int regnum)
+{
+	return ((regnum > 16 && regnum < 24) ? 4 : 8);
+}
+
+static __inline int
+gdb_cpu_signal(int type, int code __unused)
+{
+	return (type);
+}
+
+static __inline int
+gdb_cpu_query(void)
+{
+	return (0);
+}
+
+void *gdb_cpu_getreg(int, size_t *);
+void gdb_cpu_setreg(int, register_t);
+
+#endif /* !_MACHINE_GDB_MACHDEP_H_ */