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Annotation of XNU/osfmk/ppc/testjump.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
                      3:  *
                      4:  * @APPLE_LICENSE_HEADER_START@
                      5:  * 
                      6:  * The contents of this file constitute Original Code as defined in and
                      7:  * are subject to the Apple Public Source License Version 1.1 (the
                      8:  * "License").  You may not use this file except in compliance with the
                      9:  * License.  Please obtain a copy of the License at
                     10:  * http://www.apple.com/publicsource and read it before using this file.
                     11:  * 
                     12:  * This Original Code and all software distributed under the License are
                     13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
                     14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
                     15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
                     16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
                     17:  * License for the specific language governing rights and limitations
                     18:  * under the License.
                     19:  * 
                     20:  * @APPLE_LICENSE_HEADER_END@
                     21:  */
                     22: /*
                     23:  * @OSF_FREE_COPYRIGHT@
                     24:  */
                     25: 
                     26: #define VERBOSE 0
                     27: 
                     28: #include <ppc/setjmp.h>
                     29: 
                     30: int recursed(jmp_buf_t *bufp, int retval, int depth)
                     31: {
                     32:   int mumbojumbo[16];
                     33:   int i;
                     34:  
                     35: #if VERBOSE
                     36:   for (i=0;i<depth;i++)
                     37:     printf(" ");
                     38:   printf("in recursed(0x%x,%d,%d)\n",bufp,retval,depth);
                     39: #endif
                     40:   if (depth == 0) {
                     41: #if VERBOSE
                     42:     printf("LONGJUMPING from depth %d to buffer at 0x%x!\n",retval, bufp);
                     43: #endif
                     44:     _longjmp(bufp, retval);
                     45:     printf("SHOULDN'T GET HERE\n");
                     46:   } else {
                     47:     recursed(bufp,retval,depth-1);
                     48:   }
                     49:   return mumbojumbo[15]=-1; /* make sure we generate our own frame */
                     50: }
                     51: 
                     52: int testjump()
                     53: {
                     54:   jmp_buf_t  buf;
                     55:   int val;
                     56:   int i;
                     57: 
                     58:   printf("calling setjmp\n");
                     59: 
                     60:   val = _setjmp(&buf);
                     61: #if VERBOSE
                     62:   for (i=0; i<64; i++) {
                     63:     if ((i % 8) == 0) printf("\n%2d :",i);
                     64:     printf(" %8x",buf.jmp_buf[i]);
                     65:   }
                     66: #endif
                     67:   printf("\nsetjmp returned %d, structure at 0x%x\n",val,&buf);
                     68: 
                     69:   if (val < 5)
                     70:     recursed(&buf,val+1,val+1);
                     71: 
                     72:   printf("returning from setjmp/longjmp test\n");
                     73: }
                     74: 

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