[src/sommerfeld_i386mp_1]: src/sys/arch/i386/include Declare some asm stateme...

[enami <enami%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/1c252ccf06c8
branches:  sommerfeld_i386mp_1
changeset: 482452:1c252ccf06c8
user:      enami <enami%NetBSD.org@localhost>
date:      Fri Nov 30 06:53:57 2001 +0000

description:
Declare some asm statement with output as volatile.  Without this,
gcc with -march=pentiumpro produce bad code.

diffstat:

 sys/arch/i386/include/profile.h |  73 +++++++++++++++++++++++++++++++++++++++++
 1 files changed, 73 insertions(+), 0 deletions(-)

diffs (77 lines):

diff -r 5557ee92f6a9 -r 1c252ccf06c8 sys/arch/i386/include/profile.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/i386/include/profile.h   Fri Nov 30 06:53:57 2001 +0000
@@ -0,0 +1,73 @@
+/*     $NetBSD: profile.h,v 1.16.2.2 2001/11/30 06:53:57 enami Exp $   */
+
+/*
+ * 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
+
+#ifdef __ELF__
+#define MCOUNT_ENTRY   "__mcount"
+#define MCOUNT_COMPAT  __weak_alias(mcount, __mcount)
+#else
+#define MCOUNT_ENTRY   "mcount"
+#define MCOUNT_COMPAT  /* nothing */
+#endif
+
+#define        MCOUNT \
+MCOUNT_COMPAT                                                          \
+extern void mcount __P((void)) __asm__(MCOUNT_ENTRY);                  \
+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__ __volatile__("movl 4(%%ebp),%0" : "=r" (selfpc));       \
+       /*                                                              \
+        * frompcindex = pc pushed by call into self.                   \
+        */                                                             \
+       __asm__ __volatile__("movl (%%ebp),%0;movl 4(%0),%0"            \
+           : "=r" (frompcindex));                                      \
+       _mcount((u_long)frompcindex, (u_long)selfpc);                   \
+}
+
+#ifdef _KERNEL
+#define        MCOUNT_ENTER    (void)&s; __asm__("cli");
+#define        MCOUNT_EXIT     __asm__("sti");
+#endif /* _KERNEL */