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