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[pf3gnuchains/pf3gnuchains3x.git] / newlib / libc / machine / microblaze / longjmp.S

diff --git a/newlib/libc/machine/microblaze/longjmp.S b/newlib/libc/machine/microblaze/longjmp.S
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+/* Copyright (c) 2001, 2009 Xilinx, Inc.  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 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 of Xilinx 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 HOLDER 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
+   HOLDER 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.
+  
+ * 
+ * longjmp - non-local jump to a saved stack context
+ * args    - r5 - jmp_buf
+ *           r6 - val
+ *
+ * jmpbuf frame structure
+ * ---------------------
+ *
+ *      +-------------+         + 0
+ *      |     r1      |
+ *      +-------------+         + 4    
+ *      |     r13     |
+ *      |      .      |
+ *      |      .      |
+ *      |      .      |
+ *      |     r31     |         
+ *      +-------------+         + 80
+ *      |      .      |
+ *      |      .      |        
+ */        
+
+    
+.globl longjmp
+.section .text
+.align 2  
+.ent longjmp    
+longjmp:
+    lwi     r1, r5, 0
+    lwi     r13, r5, 4
+    lwi     r14, r5, 8
+    lwi     r15, r5, 12       
+    lwi     r16, r5, 16
+    lwi     r17, r5, 20
+    lwi     r18, r5, 24       
+    lwi     r19, r5, 28
+    lwi     r20, r5, 32
+    lwi     r21, r5, 36
+    lwi     r22, r5, 40
+    lwi     r23, r5, 44
+    lwi     r24, r5, 48
+    lwi     r25, r5, 52
+    lwi     r26, r5, 56
+    lwi     r27, r5, 60                        
+    lwi     r28, r5, 64                        
+    lwi     r29, r5, 68                        
+    lwi     r30, r5, 72
+    lwi     r31, r5, 76                                            
+
+    rtsd    r15, 8
+    or      r3, r0, r6
+.end longjmp