1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #if 0 33 #ifndef lint 34 static char sccsid[] = "@(#)lookup.c 8.1 (Berkeley) 6/6/93"; 35 #endif /* not lint */ 36 #endif 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include "gprof.h" 42 43 /* 44 * look up an address in a sorted-by-address namelist 45 * this deals with misses by mapping them to the next lower 46 * entry point. 47 */ 48 nltype * 49 nllookup(unsigned long address) 50 { 51 register long low; 52 register long middle; 53 register long high; 54 # ifdef DEBUG 55 register int probes; 56 57 probes = 0; 58 # endif /* DEBUG */ 59 for ( low = 0 , high = nname - 1 ; low != high ; ) { 60 # ifdef DEBUG 61 probes += 1; 62 # endif /* DEBUG */ 63 middle = ( high + low ) >> 1; 64 if ( nl[ middle ].value <= address && nl[ middle+1 ].value > address ) { 65 # ifdef DEBUG 66 if ( debug & LOOKUPDEBUG ) { 67 printf( "[nllookup] %d (%d) probes\n" , probes , nname-1 ); 68 } 69 # endif /* DEBUG */ 70 #if defined(__arm__) 71 if (nl[middle].name[0] == '$' && 72 nl[middle-1].value == nl[middle].value) 73 middle--; 74 #endif 75 76 return &nl[ middle ]; 77 } 78 if ( nl[ middle ].value > address ) { 79 high = middle; 80 } else { 81 low = middle + 1; 82 } 83 } 84 # ifdef DEBUG 85 if ( debug & LOOKUPDEBUG ) { 86 fprintf( stderr , "[nllookup] (%d) binary search fails\n" , 87 nname-1 ); 88 } 89 # endif /* DEBUG */ 90 return 0; 91 } 92 93 arctype * 94 arclookup(nltype *parentp, nltype *childp) 95 { 96 arctype *arcp; 97 98 if ( parentp == 0 || childp == 0 ) { 99 fprintf( stderr, "[arclookup] parentp == 0 || childp == 0\n" ); 100 return 0; 101 } 102 # ifdef DEBUG 103 if ( debug & LOOKUPDEBUG ) { 104 printf( "[arclookup] parent %s child %s\n" , 105 parentp -> name , childp -> name ); 106 } 107 # endif /* DEBUG */ 108 for ( arcp = parentp -> children ; arcp ; arcp = arcp -> arc_childlist ) { 109 # ifdef DEBUG 110 if ( debug & LOOKUPDEBUG ) { 111 printf( "[arclookup]\t arc_parent %s arc_child %s\n" , 112 arcp -> arc_parentp -> name , 113 arcp -> arc_childp -> name ); 114 } 115 # endif /* DEBUG */ 116 if ( arcp -> arc_childp == childp ) { 117 return arcp; 118 } 119 } 120 return 0; 121 } 122