gprof: Retire a.out support

FreeBSD has used ELF binaries/libraries for decades, but still has some
support for legacy a.out binaries.  Portions of this have been retired
over time, but support remained in ldd, ldconfig, and gprof.

Retire gprof support; if anyone needs to do development on a.out
binaries still they will be best served by installing a full FreeBSD 2.x
or other obsolete version in a jail.

Kernel support for executing a.out binaries is unchnaged.

Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D27480

4 files changed, 1 insertions, 244 deletions

diff --git a/usr.bin/gprof/Makefile b/usr.bin/gprof/Makefile
index d98475f174a8..1b540355cd45 100644
--- a/usr.bin/gprof/Makefile
+++ b/usr.bin/gprof/Makefile
@@ -5,10 +5,6 @@ PROG=	gprof
 SRCS=	gprof.c arcs.c dfn.c elf.c lookup.c hertz.c \
 	printgprof.c printlist.c kernel.c
 
-.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386" 
-SRCS+=	aout.c
-CFLAGS+=	-DWITH_AOUT
-.endif
 FILES=	gprof.flat gprof.callg
 FILESDIR=	${SHAREDIR}/misc
 
diff --git a/usr.bin/gprof/aout.c b/usr.bin/gprof/aout.c
deleted file mode 100644
index 752c67280d2d..000000000000
--- a/usr.bin/gprof/aout.c
+++ /dev/null
@@ -1,231 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * 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. 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 <string.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;
-
-    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 == NULL)
-	errx( 1 , "no room for %zu 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 == NULL ) {
-	warnx("no room for %u 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;
-}
diff --git a/usr.bin/gprof/gprof.c b/usr.bin/gprof/gprof.c
index 8e1b0709229a..2723eb2d8178 100644
--- a/usr.bin/gprof/gprof.c
+++ b/usr.bin/gprof/gprof.c
@@ -161,11 +161,7 @@ main(int argc, char **argv)
 	 *	get information from the executable file.
 	 */
     if ((Kflag && kernel_getnfile(a_outname, &defaultEs) == -1) ||
-      (!Kflag && elf_getnfile(a_outname, &defaultEs) == -1
-#ifdef WITH_AOUT
-      && aout_getnfile(a_outname, &defaultEs) == -1
-#endif
-      ))
+      (!Kflag && elf_getnfile(a_outname, &defaultEs) == -1))
 	errx(1, "%s: bad format", a_outname);
 	/*
 	 *	sort symbol table.
diff --git a/usr.bin/gprof/gprof.h b/usr.bin/gprof/gprof.h
index fd27f3a46d93..d13d4eb04455 100644
--- a/usr.bin/gprof/gprof.h
+++ b/usr.bin/gprof/gprof.h
@@ -253,9 +253,6 @@ void		addarc(nltype *, nltype *, long);
 bool		addcycle(arctype **, arctype **);
 void		addlist(struct stringlist *, char *);
 void		alignentries(void);
-#ifdef WITH_AOUT
-int		aout_getnfile(const char *, char ***);
-#endif
 int		arccmp(arctype *, arctype *);
 arctype		*arclookup(nltype *, nltype *);
 void		asgnsamples(void);
@@ -322,7 +319,6 @@ int		totalcmp(const void *, const void *);
 #define	TALLYDEBUG	8
 #define	TIMEDEBUG	16
 #define	SAMPLEDEBUG	32
-#define	AOUTDEBUG	64
 #define	CALLDEBUG	128
 #define	LOOKUPDEBUG	256
 #define	PROPDEBUG	512