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, 109 insertions, 0 deletions

diff --git a/sys/gdb/gdb_int.h b/sys/gdb/gdb_int.h
new file mode 100644
index 0000000..1a043bd
--- /dev/null
+++ b/sys/gdb/gdb_int.h
@@ -0,0 +1,109 @@
+/*
+ * 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 _GDB_GDB_INT_H_
+#define	_GDB_GDB_INT_H_
+
+extern struct gdb_dbgport *gdb_cur;
+
+extern char *gdb_rxp;
+extern size_t gdb_rxsz;
+extern char *gdb_txp;
+
+int gdb_rx_begin(void);
+int gdb_rx_equal(const char *);
+int gdb_rx_mem(unsigned char *, size_t);
+int gdb_rx_varhex(uintmax_t *);
+
+static __inline int
+gdb_rx_char(void)
+{
+	int c;
+
+	if (gdb_rxsz > 0) {
+		c = *gdb_rxp++;
+		gdb_rxsz--;
+	} else
+		c = -1;
+	return (c);
+}
+
+void gdb_tx_begin(char);
+int gdb_tx_end(void);
+int gdb_tx_mem(const unsigned char *, size_t);
+void gdb_tx_reg(int);
+
+static __inline void
+gdb_tx_char(char c)
+{
+	*gdb_txp++ = c;
+}
+
+static __inline int
+gdb_tx_empty(void)
+{
+	gdb_tx_begin('\0');
+	return (gdb_tx_end());
+}
+
+static __inline void
+gdb_tx_hex(uintmax_t n, int sz)
+{
+	gdb_txp += sprintf(gdb_txp, "%0*jx", sz, n);
+}
+
+static __inline int
+gdb_tx_err(int err)
+{
+	gdb_tx_begin('E');
+	gdb_tx_hex(err, 2);
+	return (gdb_tx_end());
+}
+
+static __inline int
+gdb_tx_ok(void)
+{
+	gdb_tx_begin('O');
+	gdb_tx_char('K');
+	return (gdb_tx_end());
+}
+
+static __inline void
+gdb_tx_str(const char *s)
+{
+	while (*s)
+		*gdb_txp++ = *s++;
+}
+
+static __inline void
+gdb_tx_varhex(uintmax_t n)
+{
+	gdb_txp += sprintf(gdb_txp, "%jx", n);
+}
+
+#endif /* !_GDB_GDB_INT_H_ */