BSD 4.4 Lite Kernel Sources

1 files changed, 56 insertions, 0 deletions

diff --git a/sys/amd64/include/profile.h b/sys/amd64/include/profile.h
new file mode 100644
index 0000000..f30efff
--- /dev/null
+++ b/sys/amd64/include/profile.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
+ *
+ *	@(#)profile.h	8.1 (Berkeley) 6/11/93
+ */
+
+#define	_MCOUNT_DECL static inline void _mcount
+
+#define	MCOUNT \
+extern void mcount() asm("mcount"); void mcount() { \
+	int selfpc, frompcindex; \
+	/* \
+	 * find the return address for mcount, \
+	 * and the return address for mcount's caller. \
+	 * \
+	 * selfpc = pc pushed by mcount call \
+	 */ \
+	asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \
+	/* \
+	 * frompcindex = pc pushed by jsr into self. \
+	 * In GCC the caller's stack frame has already been built so we \
+	 * have to chase a6 to find caller's raddr. \
+	 */ \
+	asm("movl (%%ebp),%0" : "=r" (frompcindex)); \
+	frompcindex = ((int *)frompcindex)[1]; \
+	_mcount(frompcindex, selfpc); \
+}