Annotation of src/usr.bin/gprof/i386.c, Revision 1.9
1.9 ! espie 1: /* $OpenBSD: i386.c,v 1.8 2003/06/04 16:24:45 deraadt Exp $ */
1.1 deraadt 2: /* $NetBSD: i386.c,v 1.5 1995/04/19 07:16:04 cgd Exp $ */
3:
1.6 tholo 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:
1.1 deraadt 29: #ifndef lint
1.9 ! espie 30: static char rcsid[] = "$OpenBSD: i386.c,v 1.8 2003/06/04 16:24:45 deraadt Exp $";
1.1 deraadt 31: #endif /* not lint */
32:
33: #include "gprof.h"
34:
1.7 art 35: #define iscall(off) ((*(u_char *)&textspace[off]) == 0xE8)
1.3 tholo 36:
1.4 mickey 37: void
1.9 ! espie 38: findcall(nltype *parentp, unsigned long p_lowpc, unsigned long p_highpc)
1.1 deraadt 39: {
1.7 art 40: unsigned long pc;
1.3 tholo 41: long len;
42: nltype *childp;
43: unsigned long destpc;
1.7 art 44: int off;
1.3 tholo 45:
46: if (textspace == 0)
47: return;
48: if (p_lowpc < s_lowpc)
49: p_lowpc = s_lowpc;
50: if (p_highpc > s_highpc)
51: p_highpc = s_highpc;
52: # ifdef DEBUG
53: if ( debug & CALLDEBUG ) {
54: printf( "[findcall] %s: 0x%x to 0x%x\n" ,
55: parentp -> name , p_lowpc , p_highpc );
56: }
1.5 danh 57: # endif /* DEBUG */
1.7 art 58: for (pc = p_lowpc; pc < p_highpc; pc += len) {
59: off = pc - s_lowpc;
1.3 tholo 60: len = 1;
1.7 art 61: if (iscall(off)) {
1.9 ! espie 62: destpc = *(unsigned long *)&textspace[off + 1] + off + 5;
1.3 tholo 63: # ifdef DEBUG
64: if ( debug & CALLDEBUG ) {
65: printf( "[findcall]\t0x%x:calls" , pc - textspace );
66: printf( "\tdestpc 0x%x" , destpc );
67: }
1.5 danh 68: # endif /* DEBUG */
1.3 tholo 69: if (destpc >= s_lowpc && destpc <= s_highpc) {
70: childp = nllookup(destpc);
71: # ifdef DEBUG
72: if ( debug & CALLDEBUG ) {
73: printf( " childp->name %s" , childp -> name );
74: printf( " childp->value 0x%x\n" ,
75: childp -> value );
76: }
1.5 danh 77: # endif /* DEBUG */
1.3 tholo 78: if (childp != NULL && childp->value == destpc) {
79: addarc(parentp, childp, 0L);
80: len += 4;
81: continue;
82: }
83: }
84: # ifdef DEBUG
85: if ( debug & CALLDEBUG ) {
86: printf( "\tbut it's a botch\n" );
87: }
1.5 danh 88: # endif /* DEBUG */
1.3 tholo 89: }
90: }
1.1 deraadt 91: }