8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
232 lines
6.3 KiB
C
232 lines
6.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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/* From: */
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#ifndef lint
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static char sccsid[] = "@(#)gprof.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <netinet/in.h>
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#include <a.out.h>
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#include <err.h>
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#include <string.h>
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#include "gprof.h"
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static void getstrtab(FILE *, const char *);
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static void getsymtab(FILE *, const char *);
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static void gettextspace(FILE *);
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static bool funcsymbol(struct nlist *);
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static char *strtab; /* string table in core */
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static long ssiz; /* size of the string table */
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static struct exec xbuf; /* exec header of a.out */
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/* Things which get -E excluded by default. */
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static char *excludes[] = { "mcount", "__mcleanup", NULL };
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/*
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* Set up string and symbol tables from a.out.
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* and optionally the text space.
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* On return symbol table is sorted by value.
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*
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* Returns 0 on success, -1 on failure.
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*/
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int
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aout_getnfile(const char *filename, char ***defaultEs)
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{
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FILE *nfile;
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nfile = fopen( filename ,"r");
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if (nfile == NULL)
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err( 1 , "%s", filename );
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fread(&xbuf, 1, sizeof(xbuf), nfile);
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if (N_BADMAG(xbuf)) {
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fclose(nfile);
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return -1;
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}
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getstrtab(nfile, filename);
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getsymtab(nfile, filename);
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gettextspace( nfile );
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fclose(nfile);
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# ifdef DEBUG
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if ( debug & AOUTDEBUG ) {
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register int j;
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for (j = 0; j < nname; j++){
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printf("[getnfile] 0X%08lx\t%s\n", nl[j].value, nl[j].name);
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}
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}
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# endif /* DEBUG */
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*defaultEs = excludes;
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return 0;
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}
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static void
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getstrtab(FILE *nfile, const char *filename)
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{
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fseek(nfile, (long)(N_SYMOFF(xbuf) + xbuf.a_syms), 0);
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if (fread(&ssiz, sizeof (ssiz), 1, nfile) == 0)
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errx( 1 , "%s: no string table (old format?)" , filename );
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strtab = calloc(ssiz, 1);
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if (strtab == NULL)
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errx( 1 , "%s: no room for %ld bytes of string table", filename , ssiz);
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if (fread(strtab+sizeof(ssiz), ssiz-sizeof(ssiz), 1, nfile) != 1)
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errx( 1 , "%s: error reading string table" , filename );
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}
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/*
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* Read in symbol table
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*/
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static void
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getsymtab(FILE *nfile, const char *filename)
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{
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register long i;
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int askfor;
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struct nlist nbuf;
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/* pass1 - count symbols */
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fseek(nfile, (long)N_SYMOFF(xbuf), 0);
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nname = 0;
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for (i = xbuf.a_syms; i > 0; i -= sizeof(struct nlist)) {
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fread(&nbuf, sizeof(nbuf), 1, nfile);
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if ( ! funcsymbol( &nbuf ) ) {
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continue;
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}
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nname++;
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}
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if (nname == 0)
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errx( 1 , "%s: no symbols" , filename );
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askfor = nname + 1;
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nl = (nltype *) calloc( askfor , sizeof(nltype) );
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if (nl == NULL)
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errx( 1 , "no room for %zu bytes of symbol table" ,
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askfor * sizeof(nltype) );
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/* pass2 - read symbols */
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fseek(nfile, (long)N_SYMOFF(xbuf), 0);
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npe = nl;
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nname = 0;
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for (i = xbuf.a_syms; i > 0; i -= sizeof(struct nlist)) {
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fread(&nbuf, sizeof(nbuf), 1, nfile);
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if ( ! funcsymbol( &nbuf ) ) {
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# ifdef DEBUG
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if ( debug & AOUTDEBUG ) {
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printf( "[getsymtab] rejecting: 0x%x %s\n" ,
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nbuf.n_type , strtab + nbuf.n_un.n_strx );
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}
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# endif /* DEBUG */
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continue;
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}
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npe->value = nbuf.n_value;
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npe->name = strtab+nbuf.n_un.n_strx;
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# ifdef DEBUG
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if ( debug & AOUTDEBUG ) {
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printf( "[getsymtab] %d %s 0x%08lx\n" ,
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nname , npe -> name , npe -> value );
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}
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# endif /* DEBUG */
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npe++;
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nname++;
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}
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npe->value = -1;
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}
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/*
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* read in the text space of an a.out file
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*/
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static void
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gettextspace(FILE *nfile)
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{
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textspace = (u_char *) malloc( xbuf.a_text );
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if ( textspace == NULL ) {
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warnx("no room for %u bytes of text space: can't do -c" ,
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xbuf.a_text );
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return;
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}
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(void) fseek( nfile , N_TXTOFF( xbuf ) , 0 );
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if ( fread( textspace , 1 , xbuf.a_text , nfile ) != xbuf.a_text ) {
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warnx("couldn't read text space: can't do -c");
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free( textspace );
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textspace = 0;
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return;
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}
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}
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static bool
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funcsymbol(struct nlist *nlistp)
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{
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char *name, c;
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/*
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* must be a text symbol,
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* and static text symbols don't qualify if aflag set.
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*/
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if ( ! ( ( nlistp -> n_type == ( N_TEXT | N_EXT ) )
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|| ( ( nlistp -> n_type == N_TEXT ) && ( aflag == 0 ) ) ) ) {
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return FALSE;
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}
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/*
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* name must start with an underscore if uflag is set.
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* can't have any `funny' characters in name,
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* where `funny' means `.' (.o file names)
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* need to make an exception for sparc .mul & co.
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* perhaps we should just drop this code entirely...
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*/
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name = strtab + nlistp -> n_un.n_strx;
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if ( uflag && *name != '_' )
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return FALSE;
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#ifdef sparc
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if ( *name == '.' ) {
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char *p = name + 1;
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if ( *p == 'u' )
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p++;
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if ( strcmp ( p, "mul" ) == 0 || strcmp ( p, "div" ) == 0 ||
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strcmp ( p, "rem" ) == 0 )
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return TRUE;
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}
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#endif
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while ( (c = *name++) ) {
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if ( c == '.' ) {
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return FALSE;
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}
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}
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return TRUE;
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}
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