doc: Clarify timer documentation.

[bertos.git] / bertos / emul / switch_i386.S

diff --git a/bertos/emul/switch_i386.S b/bertos/emul/switch_i386.S
index 6931d45c9986636b931ebb4be1411338dda471e7..5032b31c2556d5fcb9bb60b0a7af8ad2d6a2ec59 100644 (file)
--- a/bertos/emul/switch_i386.S
+++ b/bertos/emul/switch_i386.S
@@ -1,21 +1,51 @@
-/*!
+/**
  * \file
  * <!--
- * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
- * Copyright 1999,2000,2001 Bernardo Innocenti <bernie@develer.com>
- * This file is part of DevLib - See devlib/README for information.
- * -->
+ * This file is part of BeRTOS.
  *
- * \brief i386 context switch
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2004, 2008 Develer S.r.l. (http://www.develer.com/)
+ * Copyright 1999, 2000, 2001 Bernie Innocenti <bernie@codewiz.org>
+ * -->
  *
  * \version $Id$
+ * \author Bernie Innocenti <bernie@codewiz.org>
  *
- * \author Bernardo Innocenti <bernie@develer.com>
+ * \brief i386 context switch
  */
 
-/* void asm_switch_context(void ** new_sp, void ** save_sp) */
-.globl asm_switch_context
-asm_switch_context:
+#ifdef __APPLE__
+    // This workaround is necessary to compile under OS X assembler.
+    #define SWITCH_CONTEXT _asm_switch_context
+#else
+    #define SWITCH_CONTEXT asm_switch_context
+#endif
+
+/* void asm_switch_context(void ** new_sp [sp+4], void ** save_sp [sp+8]) */
+.globl SWITCH_CONTEXT
+SWITCH_CONTEXT:
        pushl   %eax
        pushl   %ebx
        pushl   %ecx
@@ -35,10 +65,3 @@ asm_switch_context:
        popl    %ebx
        popl    %eax
        ret
-
-/* int asm_switch_version(void) */
-.globl asm_switch_version
-asm_switch_version:
-       mov     $1,%eax
-       ret
-