2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 static char sccsid[] = "@(#)gprof.c 8.1 (Berkeley) 6/6/93";
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
44 #include <netinet/in.h>
51 static void getstrtab(FILE *, const char *);
52 static void getsymtab(FILE *, const char *);
53 static void gettextspace(FILE *);
54 static bool funcsymbol(struct nlist *);
56 static char *strtab; /* string table in core */
57 static long ssiz; /* size of the string table */
58 static struct exec xbuf; /* exec header of a.out */
60 /* Things which get -E excluded by default. */
61 static char *excludes[] = { "mcount", "__mcleanup", NULL };
64 * Set up string and symbol tables from a.out.
65 * and optionally the text space.
66 * On return symbol table is sorted by value.
68 * Returns 0 on success, -1 on failure.
71 aout_getnfile(const char *filename, char ***defaultEs)
76 nfile = fopen( filename ,"r");
78 err( 1 , "%s", filename );
79 fread(&xbuf, 1, sizeof(xbuf), nfile);
84 getstrtab(nfile, filename);
85 getsymtab(nfile, filename);
86 gettextspace( nfile );
89 if ( debug & AOUTDEBUG ) {
92 for (j = 0; j < nname; j++){
93 printf("[getnfile] 0X%08lx\t%s\n", nl[j].value, nl[j].name);
97 *defaultEs = excludes;
102 getstrtab(FILE *nfile, const char *filename)
105 fseek(nfile, (long)(N_SYMOFF(xbuf) + xbuf.a_syms), 0);
106 if (fread(&ssiz, sizeof (ssiz), 1, nfile) == 0)
107 errx( 1 , "%s: no string table (old format?)" , filename );
108 strtab = calloc(ssiz, 1);
110 errx( 1 , "%s: no room for %ld bytes of string table", filename , ssiz);
111 if (fread(strtab+sizeof(ssiz), ssiz-sizeof(ssiz), 1, nfile) != 1)
112 errx( 1 , "%s: error reading string table" , filename );
116 * Read in symbol table
119 getsymtab(FILE *nfile, const char *filename)
125 /* pass1 - count symbols */
126 fseek(nfile, (long)N_SYMOFF(xbuf), 0);
128 for (i = xbuf.a_syms; i > 0; i -= sizeof(struct nlist)) {
129 fread(&nbuf, sizeof(nbuf), 1, nfile);
130 if ( ! funcsymbol( &nbuf ) ) {
136 errx( 1 , "%s: no symbols" , filename );
138 nl = (nltype *) calloc( askfor , sizeof(nltype) );
140 errx( 1 , "no room for %d bytes of symbol table" ,
141 askfor * sizeof(nltype) );
143 /* pass2 - read symbols */
144 fseek(nfile, (long)N_SYMOFF(xbuf), 0);
147 for (i = xbuf.a_syms; i > 0; i -= sizeof(struct nlist)) {
148 fread(&nbuf, sizeof(nbuf), 1, nfile);
149 if ( ! funcsymbol( &nbuf ) ) {
151 if ( debug & AOUTDEBUG ) {
152 printf( "[getsymtab] rejecting: 0x%x %s\n" ,
153 nbuf.n_type , strtab + nbuf.n_un.n_strx );
158 npe->value = nbuf.n_value;
159 npe->name = strtab+nbuf.n_un.n_strx;
161 if ( debug & AOUTDEBUG ) {
162 printf( "[getsymtab] %d %s 0x%08lx\n" ,
163 nname , npe -> name , npe -> value );
173 * read in the text space of an a.out file
176 gettextspace(FILE *nfile)
179 textspace = (u_char *) malloc( xbuf.a_text );
180 if ( textspace == 0 ) {
181 warnx("no room for %lu bytes of text space: can't do -c" ,
185 (void) fseek( nfile , N_TXTOFF( xbuf ) , 0 );
186 if ( fread( textspace , 1 , xbuf.a_text , nfile ) != xbuf.a_text ) {
187 warnx("couldn't read text space: can't do -c");
195 funcsymbol(struct nlist *nlistp)
200 * must be a text symbol,
201 * and static text symbols don't qualify if aflag set.
203 if ( ! ( ( nlistp -> n_type == ( N_TEXT | N_EXT ) )
204 || ( ( nlistp -> n_type == N_TEXT ) && ( aflag == 0 ) ) ) ) {
208 * name must start with an underscore if uflag is set.
209 * can't have any `funny' characters in name,
210 * where `funny' means `.' (.o file names)
211 * need to make an exception for sparc .mul & co.
212 * perhaps we should just drop this code entirely...
214 name = strtab + nlistp -> n_un.n_strx;
215 if ( uflag && *name != '_' )
218 if ( *name == '.' ) {
222 if ( strcmp ( p, "mul" ) == 0 || strcmp ( p, "div" ) == 0 ||
223 strcmp ( p, "rem" ) == 0 )
227 while ( (c = *name++) ) {