debug_trace: Add 64bit variant

* x86_64/debug_trace.S: New file.

1 files changed, 56 insertions, 0 deletions

diff --git a/x86_64/debug_trace.S b/x86_64/debug_trace.S
new file mode 100644
index 00000000..7bed5ccc
--- /dev/null
+++ b/x86_64/debug_trace.S
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 1994 The University of Utah and
+ * the Computer Systems Laboratory at the University of Utah (CSL).
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify and distribute this software is hereby
+ * granted provided that (1) source code retains these copyright, permission,
+ * and disclaimer notices, and (2) redistributions including binaries
+ * reproduce the notices in supporting documentation, and (3) all advertising
+ * materials mentioning features or use of this software display the following
+ * acknowledgement: ``This product includes software developed by the
+ * Computer Systems Laboratory at the University of Utah.''
+ *
+ * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
+ * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
+ * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * CSL requests users of this software to return to csl-dist@cs.utah.edu any
+ * improvements that they make and grant CSL redistribution rights.
+ *
+ *      Author: Bryan Ford, University of Utah CSL
+ */
+
+#ifdef DEBUG
+
+#include <mach/machine/asm.h>
+#include <i386/xen.h>
+
+#include "debug.h"
+
+	.text
+ENTRY(_debug_trace)
+	pushf
+	cli
+	pushq	%rax
+	pushq	%rbx
+	.byte	0x36	/* SS: bug in gas? */
+	movl	%ss:EXT(debug_trace_pos),%eax
+	movq	S_ARG0,%rbx
+	movq	%rbx,%ss:EXT(debug_trace_buf)(,%eax,16)
+	movl	S_ARG1,%ebx
+	movl	%ebx,%ss:EXT(debug_trace_buf)+8(,%eax,16)
+	incl	%eax
+	andl	$DEBUG_TRACE_LEN-1,%eax
+	.byte	0x36	/* SS: bug in gas? */
+	movl	%eax,%ss:EXT(debug_trace_pos)
+	popq	%rbx
+	popq	%rax
+	popf
+	ret
+
+#endif /* DEBUG */
+
+/* XXX gas bug?  need at least one symbol... */
+foo:
+