Assembler version of gmon handling.

sysdeps/arm/machine-gmon.h

@@ -0,0 +1,55 @@
+/* Machine-dependent definitions for profiling support.  ARM version.
+   Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* GCC for the ARM cannot compile __builtin_return_address(N) for N != 0, 
+   so we must use an assembly stub.  */
+
+#include <sysdep.h>
+#ifndef NO_UNDERSCORES
+/* The asm symbols for C functions are `_function'.
+   The canonical name for the counter function is `mcount', no _.  */
+void _mcount (void) asm ("mcount");
+#else
+/* The canonical name for the function is `_mcount' in both C and asm,
+   but some old asm code might assume it's `mcount'.  */
+void _mcount (void);
+weak_alias (_mcount, mcount)
+#endif
+
+static void mcount_internal (u_long frompc, u_long selfpc);
+
+#define _MCOUNT_DECL(frompc, selfpc) \
+static void mcount_internal (u_long frompc, u_long selfpc)
+
+#define MCOUNT \
+void _mcount (void)							      \
+{									      \
+  register unsigned long int frompc, selfpc;				      \
+  __asm__("movs fp, fp; "						      \
+          "moveq %0, $0; "						      \
+	  "ldrne %0, [fp, $-4]; "					      \
+	  "ldrne %1, [fp, $-12]; "					      \
+	  "movnes %1, %1; "						      \
+	  "ldrne %1, [%1, $-4]; "					      \
+	  : "=g" (selfpc), "=g" (frompc)				      \
+	  : : "cc"							      \
+	  );								      \
+  if (selfpc)								      \
+    mcount_internal(frompc, selfpc);					      \
+}