1 /* $OpenBSD: i386.c,v 1.10 2009/10/27 23:59:38 deraadt Exp $ */ 2 /* $NetBSD: i386.c,v 1.5 1995/04/19 07:16:04 cgd Exp $ */ 3 4 /*- 5 * Copyright (c) 1996 SigmaSoft, Th. Lockert 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include "gprof.h" 30 31 #define iscall(off) ((*(u_char *)&textspace[off]) == 0xE8) 32 33 void 34 findcall(nltype *parentp, unsigned long p_lowpc, unsigned long p_highpc) 35 { 36 unsigned long pc; 37 long len; 38 nltype *childp; 39 unsigned long destpc; 40 int off; 41 42 if (textspace == 0) 43 return; 44 if (p_lowpc < s_lowpc) 45 p_lowpc = s_lowpc; 46 if (p_highpc > s_highpc) 47 p_highpc = s_highpc; 48 # ifdef DEBUG 49 if ( debug & CALLDEBUG ) { 50 printf( "[findcall] %s: 0x%x to 0x%x\n" , 51 parentp -> name , p_lowpc , p_highpc ); 52 } 53 # endif /* DEBUG */ 54 for (pc = p_lowpc; pc < p_highpc; pc += len) { 55 off = pc - s_lowpc; 56 len = 1; 57 if (iscall(off)) { 58 destpc = *(unsigned long *)&textspace[off + 1] + off + 5; 59 # ifdef DEBUG 60 if ( debug & CALLDEBUG ) { 61 printf( "[findcall]\t0x%x:calls" , pc - textspace ); 62 printf( "\tdestpc 0x%x" , destpc ); 63 } 64 # endif /* DEBUG */ 65 if (destpc >= s_lowpc && destpc <= s_highpc) { 66 childp = nllookup(destpc); 67 # ifdef DEBUG 68 if ( debug & CALLDEBUG ) { 69 printf( " childp->name %s" , childp -> name ); 70 printf( " childp->value 0x%x\n" , 71 childp -> value ); 72 } 73 # endif /* DEBUG */ 74 if (childp != NULL && childp->value == destpc) { 75 addarc(parentp, childp, 0L); 76 len += 4; 77 continue; 78 } 79 } 80 # ifdef DEBUG 81 if ( debug & CALLDEBUG ) { 82 printf( "\tbut it's a botch\n" ); 83 } 84 # endif /* DEBUG */ 85 } 86 } 87 } 88