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