osfmk/ppc/testjump.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * @OSF_FREE_COPYRIGHT@
  27  */
  28
  29 #define VERBOSE 0
  30
  31 #include <ppc/setjmp.h>
  32
  33 int recursed(jmp_buf_t *bufp, int retval, int depth)
  34 {
  35   int mumbojumbo[16];
  36   int i;
  37
  38 #if VERBOSE
  39   for (i=0;i<depth;i++)
  40     printf(" ");
  41   printf("in recursed(0x%x,%d,%d)\n",bufp,retval,depth);
  42 #endif
  43   if (depth == 0) {
  44 #if VERBOSE
  45     printf("LONGJUMPING from depth %d to buffer at 0x%x!\n",retval, bufp);
  46 #endif
  47     _longjmp(bufp, retval);
  48     printf("SHOULDN'T GET HERE\n");
  49   } else {
  50     recursed(bufp,retval,depth-1);
  51   }
  52   return mumbojumbo[15]=-1; /* make sure we generate our own frame */
  53 }
  54
  55 int testjump()
  56 {
  57   jmp_buf_t  buf;
  58   int val;
  59   int i;
  60
  61   printf("calling setjmp\n");
  62
  63   val = _setjmp(&buf);
  64 #if VERBOSE
  65   for (i=0; i<64; i++) {
  66     if ((i % 8) == 0) printf("\n%2d :",i);
  67     printf(" %8x",buf.jmp_buf[i]);
  68   }
  69 #endif
  70   printf("\nsetjmp returned %d, structure at 0x%x\n",val,&buf);
  71
  72   if (val < 5)
  73     recursed(&buf,val+1,val+1);
  74
  75   printf("returning from setjmp/longjmp test\n");
  76 }
  77