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
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24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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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>
52 static void getstrtab(FILE *, const char *);
53 static void getsymtab(FILE *, const char *);
54 static void gettextspace(FILE *);
55 static bool funcsymbol(struct nlist *);
57 static char *strtab; /* string table in core */
58 static long ssiz; /* size of the string table */
59 static struct exec xbuf; /* exec header of a.out */
61 /* Things which get -E excluded by default. */
62 static char *excludes[] = { "mcount", "__mcleanup", NULL };
65 * Set up string and symbol tables from a.out.
66 * and optionally the text space.
67 * On return symbol table is sorted by value.
69 * Returns 0 on success, -1 on failure.
72 aout_getnfile(const char *filename, char ***defaultEs)
77 nfile = fopen( filename ,"r");
79 err( 1 , "%s", filename );
80 fread(&xbuf, 1, sizeof(xbuf), nfile);
85 getstrtab(nfile, filename);
86 getsymtab(nfile, filename);
87 gettextspace( nfile );
90 if ( debug & AOUTDEBUG ) {
93 for (j = 0; j < nname; j++){
94 printf("[getnfile] 0X%08lx\t%s\n", nl[j].value, nl[j].name);
98 *defaultEs = excludes;
103 getstrtab(FILE *nfile, const char *filename)
106 fseek(nfile, (long)(N_SYMOFF(xbuf) + xbuf.a_syms), 0);
107 if (fread(&ssiz, sizeof (ssiz), 1, nfile) == 0)
108 errx( 1 , "%s: no string table (old format?)" , filename );
109 strtab = calloc(ssiz, 1);
111 errx( 1 , "%s: no room for %ld bytes of string table", filename , ssiz);
112 if (fread(strtab+sizeof(ssiz), ssiz-sizeof(ssiz), 1, nfile) != 1)
113 errx( 1 , "%s: error reading string table" , filename );
117 * Read in symbol table
120 getsymtab(FILE *nfile, const char *filename)
126 /* pass1 - count symbols */
127 fseek(nfile, (long)N_SYMOFF(xbuf), 0);
129 for (i = xbuf.a_syms; i > 0; i -= sizeof(struct nlist)) {
130 fread(&nbuf, sizeof(nbuf), 1, nfile);
131 if ( ! funcsymbol( &nbuf ) ) {
137 errx( 1 , "%s: no symbols" , filename );
139 nl = (nltype *) calloc( askfor , sizeof(nltype) );
141 errx( 1 , "no room for %d bytes of symbol table" ,
142 askfor * sizeof(nltype) );
144 /* pass2 - read symbols */
145 fseek(nfile, (long)N_SYMOFF(xbuf), 0);
148 for (i = xbuf.a_syms; i > 0; i -= sizeof(struct nlist)) {
149 fread(&nbuf, sizeof(nbuf), 1, nfile);
150 if ( ! funcsymbol( &nbuf ) ) {
152 if ( debug & AOUTDEBUG ) {
153 printf( "[getsymtab] rejecting: 0x%x %s\n" ,
154 nbuf.n_type , strtab + nbuf.n_un.n_strx );
159 npe->value = nbuf.n_value;
160 npe->name = strtab+nbuf.n_un.n_strx;
162 if ( debug & AOUTDEBUG ) {
163 printf( "[getsymtab] %d %s 0x%08lx\n" ,
164 nname , npe -> name , npe -> value );
174 * read in the text space of an a.out file
177 gettextspace(FILE *nfile)
180 textspace = (u_char *) malloc( xbuf.a_text );
181 if ( textspace == 0 ) {
182 warnx("no room for %lu bytes of text space: can't do -c" ,
186 (void) fseek( nfile , N_TXTOFF( xbuf ) , 0 );
187 if ( fread( textspace , 1 , xbuf.a_text , nfile ) != xbuf.a_text ) {
188 warnx("couldn't read text space: can't do -c");
196 funcsymbol(struct nlist *nlistp)
201 * must be a text symbol,
202 * and static text symbols don't qualify if aflag set.
204 if ( ! ( ( nlistp -> n_type == ( N_TEXT | N_EXT ) )
205 || ( ( nlistp -> n_type == N_TEXT ) && ( aflag == 0 ) ) ) ) {
209 * name must start with an underscore if uflag is set.
210 * can't have any `funny' characters in name,
211 * where `funny' means `.' (.o file names)
212 * need to make an exception for sparc .mul & co.
213 * perhaps we should just drop this code entirely...
215 name = strtab + nlistp -> n_un.n_strx;
216 if ( uflag && *name != '_' )
219 if ( *name == '.' ) {
223 if ( strcmp ( p, "mul" ) == 0 || strcmp ( p, "div" ) == 0 ||
224 strcmp ( p, "rem" ) == 0 )
228 while ( (c = *name++) ) {