Resync new repository with old repo r5166

git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5153 42af7a65-404d-4744-a932-0658087f49c3
2026-11-02 01:31:36 +08:00 · 2012-09-17 18:18:44 +00:00
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+/**************************************************************************
+ * up_setjmp.S
+ *
+ *   Copyright (C) 2007, 2012 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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. Neither the name NuttX 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 COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ *
+ **************************************************************************/
+
+/**************************************************************************
+ * Conditional Compilation Options
+ **************************************************************************/
+
+/**************************************************************************
+ * Included Files
+ **************************************************************************/
+
+#include "up_internal.h"
+
+/**************************************************************************
+ * Private Definitions
+ **************************************************************************/
+ 
+#ifdef __CYGWIN__
+# define SYMBOL(s) _##s
+#else
+# define SYMBOL(s) s
+#endif
+
+/**************************************************************************
+ * Private Types
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Function Prototypes
+ **************************************************************************/
+
+/**************************************************************************
+ * Global Variables
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Variables
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Functions
+ **************************************************************************/
+
+/**************************************************************************
+ * Public Functions
+ **************************************************************************/
+
+	.text
+	.globl	SYMBOL(up_setjmp)
+#ifndef __CYGWIN__
+	.type	SYMBOL(up_setjmp), @function
+#endif
+SYMBOL(up_setjmp):
+
+	/* %ebx, %esi, %edi, and %ebp must be preserved.
+	 * save %ebx, $esi, and %edi now... */
+
+	movl	4(%esp), %eax
+	movl	%ebx, (JB_EBX)(%eax)
+	movl	%esi, (JB_ESI)(%eax)
+	movl	%edi, (JB_EDI)(%eax)
+
+	/* Save the value of SP as will be after we return */
+
+	leal	4(%esp), %ecx
+	movl	%ecx, (JB_SP)(%eax)
+
+	/* Save the return PC */
+
+	movl	0(%esp), %ecx
+	movl	%ecx, (JB_PC)(%eax)
+
+	/* Save the framepointer */
+
+	movl	%ebp, (JB_EBP)(%eax)
+
+	/* And return 0 */
+
+	xorl	%eax, %eax
+	ret
+#ifndef __CYGWIN__
+	.size	SYMBOL(up_setjmp), . - SYMBOL(up_setjmp)
+#endif
+	.globl	SYMBOL(up_longjmp)
+#ifndef __CYGWIN__
+	.type	SYMBOL(up_longjmp), @function
+#endif
+SYMBOL(up_longjmp):
+	movl	4(%esp), %ecx      /* U_pthread_jmpbuf in %ecx.  */
+	movl	8(%esp), %eax      /* Second argument is return value.  */
+
+	/* Save the return address now.  */
+
+	movl	(JB_PC)(%ecx), %edx
+
+	/* Restore registers.  */
+
+	movl	(JB_EBX)(%ecx), %ebx
+	movl	(JB_ESI)(%ecx), %esi
+	movl	(JB_EDI)(%ecx), %edi
+	movl	(JB_EBP)(%ecx), %ebp
+	movl	(JB_SP)(%ecx), %esp
+
+	/* Jump to saved PC.  */
+
+	jmp		*%edx
+#ifndef __CYGWIN__
+	.size SYMBOL(up_longjmp), . - SYMBOL(up_longjmp)
+#endif
+