mirror of
https://github.com/freebsd/freebsd-src
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btxld is a link editor for BTX (boot extender) clients, supporting ELF,
a.out, and binary formats.
This commit is contained in:
parent
b0923a2edc
commit
9c9f4492f8
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/cvs2svn/branches/RNORDIER/; revision=39092
7
usr.sbin/btxld/Makefile
Normal file
7
usr.sbin/btxld/Makefile
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@ -0,0 +1,7 @@
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# $Id:$
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PROG= btxld
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SRCS= btxld.c elfh.c
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MAN8= btxld.8
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.include <bsd.prog.mk>
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68
usr.sbin/btxld/btx.h
Normal file
68
usr.sbin/btxld/btx.h
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/*
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* Copyright (c) 1998 Robert Nordier
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* 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
|
||||
* are met:
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||||
* 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
|
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* documentation and/or other materials provided with the distribution.
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||||
*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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
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||||
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
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||||
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
|
||||
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id:$
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*/
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#ifndef _BTX_H_
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#define _BTX_H_
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#include <sys/types.h>
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#define BTX_PGSIZE 0x1000 /* Page size */
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#define BTX_PGBASE 0x5000 /* Start of page tables */
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#define BTX_MAXCWR 0x3bc /* Max. btx_pgctl adjustment */
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/*
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* BTX image header.
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*/
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struct btx_hdr {
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uint8_t btx_machid; /* Machine ID */
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uint8_t btx_hdrsz; /* Header size */
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uint8_t btx_magic[3]; /* Magic */
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uint8_t btx_majver; /* Major version */
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uint8_t btx_minver; /* Minor version */
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uint8_t btx_flags; /* Flags */
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uint16_t btx_pgctl; /* Paging control */
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uint16_t btx_textsz; /* Text size */
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uint32_t btx_entry; /* Client entry address */
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};
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/* btx_machid */
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#define BTX_I386 0xeb /* Intel i386 or compatible */
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/* btx_magic */
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#define BTX_MAG0 'B'
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#define BTX_MAG1 'T'
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#define BTX_MAG2 'X'
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/* btx_flags */
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#define BTX_MAPONE 0x80 /* Start mapping at page 1 */
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#define BTX_MAPPED(btx) (((btx).btx_pgctl | (BTX_PGSIZE / 4 - 1)) + 1)
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#define BTX_ORIGIN(btx) (BTX_PGBASE + BTX_MAPPED(btx) * 4)
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#define BTX_ENTRY(btx) (BTX_ORIGIN(btx) + 2 + (btx).btx_hdrsz)
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#endif /* !_BTX_H_ */
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97
usr.sbin/btxld/btxld.8
Normal file
97
usr.sbin/btxld/btxld.8
Normal file
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.\" Copyright (c) 1998 Robert Nordier
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.\" 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
|
||||
.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
|
||||
.\" 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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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
|
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.\" OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
|
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.\" OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
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.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
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.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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.\" OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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.\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $Id:$
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.\"
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.Dd September 12, 1998
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.Dt BTXLD 8
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.Os
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.Sh NAME
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.Nm btxld
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.Nd link editor for BTX clients
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.Sh SYNOPSIS
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.Nm btxld
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.Op Fl qv
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.Op Fl b Ar file
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.Op Fl E Ar address
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.Op Fl e Ar address
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.Op Fl f Ar format
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.Op Fl l Ar file
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.Op Fl o Ar filename
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.Op Fl P Ar page
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.Op Fl W Ar page
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.Ar file
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.Sh DESCRIPTION
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The
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.Nm
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utility binds the specified client executable together with a BTX
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loader program and the BTX kernel, and creates a composite object file
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suitable for loading during the boot process.
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.Pp
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The options are:
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.Bl -tag -width indent
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.It Fl q
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Quiet: inhibit warnings.
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.It Fl v
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Verbose: display information about the files processed.
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.It Fl b Ar file
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Specify the BTX kernel to be bound with the client.
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.It Fl E Ar address
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Set the client entry point.
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.It Fl e Ar address
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Set the BTX loader entry point.
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.It Fl f Ar format
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Specify the output format, where
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.Ar format
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is one of
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.Sq bin ,
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.Sq aout ,
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or
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.Sq elf .
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.It Fl l Ar file
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Specify the BTX loader to be bound with the client.
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.It Fl o Ar filename
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Name the output file. The default is
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.Dq a.out .
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.It Fl P Ar page
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Specify the first page of the client's segment to be marked
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.Sq present ,
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where
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.Ar page
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may be 0 or 1.
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.It Fl W Ar page
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Specify the first page of the client's segment to be marked
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.Sq writable ,
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where
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.Ar page
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may be 0, and should not exceed the number of pages occupied by the
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combined .text and .data segments of the client image.
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.El
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.Sh SEE ALSO
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.Xr ld 1 ,
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.Xr boot 8
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.Sh DIAGNOSTICS
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Exit status is 0 on success and >0 on error.
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.Sh AUTHORS
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.An Robert Nordier Aq rnordier@FreeBSD.org .
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550
usr.sbin/btxld/btxld.c
Normal file
550
usr.sbin/btxld/btxld.c
Normal file
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@ -0,0 +1,550 @@
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/*
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* Copyright (c) 1998 Robert Nordier
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* All rights reserved.
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*
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* 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.
|
||||
*
|
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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,
|
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$Id:$";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <a.out.h>
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#include <elf.h>
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#include "btx.h"
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#include "elfh.h"
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#define BTX_PATH "/sys/boot/i386/btx"
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#define I_LDR 0 /* BTX loader */
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#define I_BTX 1 /* BTX kernel */
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#define I_CLNT 2 /* Client program */
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#define F_BIN 0 /* Binary */
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#define F_AOUT 1 /* ZMAGIC a.out */
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#define F_ELF 2 /* 32-bit ELF */
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#define F_CNT 3 /* Number of formats */
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#define IMPURE 1 /* Writable text */
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#define MAXU32 0xffffffff /* Maximum unsigned 32-bit quantity */
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#define align(x, y) (((x) + (y) - 1) & ~((y) - 1))
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struct hdr {
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unsigned fmt; /* Format */
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unsigned flags; /* Bit flags */
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unsigned size; /* Size of file */
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unsigned text; /* Size of text segment */
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unsigned data; /* Size of data segment */
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unsigned bss; /* Size of bss segment */
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unsigned org; /* Program origin */
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unsigned entry; /* Program entry point */
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};
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static const char *const fmtlist[] = {"bin", "aout", "elf"};
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static const char binfo[] =
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"kernel: ver=%u.%02u size=%x load=%x entry=%x map=%uM "
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"pgctl=%x:%x\n";
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static const char cinfo[] =
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"client: fmt=%s size=%x text=%x data=%x bss=%x entry=%x\n";
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static const char oinfo[] =
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"output: fmt=%s size=%x text=%x data=%x org=%x entry=%x\n";
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static const char *lname =
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BTX_PATH "/btxldr/btxldr"; /* BTX loader */
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static const char *bname =
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BTX_PATH "/btx/btx"; /* BTX kernel */
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static const char *oname =
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"a.out"; /* Output filename */
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static int ppage = -1; /* First page present */
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static int wpage = -1; /* First page writable */
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static unsigned format; /* Output format */
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static uint32_t centry; /* Client entry address */
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static uint32_t lentry; /* Loader entry address */
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static int quiet; /* Inhibit warnings */
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static int verbose; /* Display information */
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static const char *tname; /* Temporary output file */
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static const char *fname; /* Current input file */
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static void cleanup(void);
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static void btxld(const char *);
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static void getbtx(int, struct btx_hdr *);
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static void gethdr(int, struct hdr *);
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static void puthdr(int, struct hdr *);
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static void copy(int, int, size_t, off_t);
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static size_t readx(int, void *, size_t, off_t);
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static void writex(int, const void *, size_t);
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static void seekx(int, off_t);
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static unsigned optfmt(const char *);
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static uint32_t optaddr(const char *);
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static int optpage(const char *, int);
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static void Warn(const char *, const char *, ...);
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static void usage(void);
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/*
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* A link editor for BTX clients.
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*/
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int
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main(int argc, char *argv[])
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{
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int c;
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while ((c = getopt(argc, argv, "qvb:E:e:f:l:o:P:W:")) != -1)
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switch (c) {
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case 'q':
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quiet = 1;
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break;
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case 'v':
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verbose = 1;
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break;
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case 'b':
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bname = optarg;
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break;
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case 'E':
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centry = optaddr(optarg);
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break;
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case 'e':
|
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lentry = optaddr(optarg);
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break;
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case 'f':
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format = optfmt(optarg);
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break;
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case 'l':
|
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lname = optarg;
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break;
|
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case 'o':
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oname = optarg;
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break;
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case 'P':
|
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ppage = optpage(optarg, 1);
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break;
|
||||
case 'W':
|
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wpage = optpage(optarg, BTX_MAXCWR);
|
||||
break;
|
||||
default:
|
||||
usage();
|
||||
}
|
||||
argc -= optind;
|
||||
argv += optind;
|
||||
if (argc != 1)
|
||||
usage();
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||||
atexit(cleanup);
|
||||
btxld(*argv);
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||||
return 0;
|
||||
}
|
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|
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/*
|
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* Clean up after errors.
|
||||
*/
|
||||
static void
|
||||
cleanup(void)
|
||||
{
|
||||
if (tname)
|
||||
remove(tname);
|
||||
}
|
||||
|
||||
/*
|
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* Read the input files; write the output file; display information.
|
||||
*/
|
||||
static void
|
||||
btxld(const char *iname)
|
||||
{
|
||||
char name[FILENAME_MAX];
|
||||
struct btx_hdr btx;
|
||||
struct hdr ihdr, ohdr;
|
||||
unsigned ldr_size, cwr;
|
||||
int fdi[3], fdo, i;
|
||||
|
||||
for (i = I_LDR; i <= I_CLNT; i++) {
|
||||
fname = i == I_LDR ? lname : i == I_BTX ? bname : iname;
|
||||
if ((fdi[i] = open(fname, O_RDONLY)) == -1)
|
||||
err(2, "%s", fname);
|
||||
switch (i) {
|
||||
case I_LDR:
|
||||
gethdr(fdi[i], &ihdr);
|
||||
if (ihdr.fmt != F_BIN)
|
||||
Warn(fname, "Loader format is %s; processing as %s",
|
||||
fmtlist[ihdr.fmt], fmtlist[F_BIN]);
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ldr_size = ihdr.size;
|
||||
break;
|
||||
case I_BTX:
|
||||
getbtx(fdi[i], &btx);
|
||||
break;
|
||||
case I_CLNT:
|
||||
gethdr(fdi[i], &ihdr);
|
||||
if (ihdr.org && ihdr.org != BTX_PGSIZE)
|
||||
Warn(fname,
|
||||
"Client origin is 0x%x; expecting 0 or 0x%x",
|
||||
ihdr.org, BTX_PGSIZE);
|
||||
}
|
||||
}
|
||||
memset(&ohdr, 0, sizeof(ohdr));
|
||||
ohdr.fmt = format;
|
||||
ohdr.text = ldr_size;
|
||||
ohdr.data = btx.btx_textsz + ihdr.size;
|
||||
ohdr.org = lentry;
|
||||
ohdr.entry = lentry;
|
||||
cwr = 0;
|
||||
if (wpage > 0 || (wpage == -1 && !(ihdr.flags & IMPURE)))
|
||||
if (wpage > 0)
|
||||
cwr = wpage;
|
||||
else {
|
||||
cwr = howmany(ihdr.text, BTX_PGSIZE);
|
||||
if (cwr > BTX_MAXCWR)
|
||||
cwr = BTX_MAXCWR;
|
||||
}
|
||||
if (ppage > 0 || (ppage && wpage && ihdr.org >= BTX_PGSIZE)) {
|
||||
btx.btx_flags |= BTX_MAPONE;
|
||||
if (!cwr)
|
||||
cwr++;
|
||||
}
|
||||
btx.btx_pgctl -= cwr;
|
||||
if (snprintf(name, sizeof(name), "%s.tmp", oname) >= sizeof(name))
|
||||
errx(2, "%s: Filename too long", oname);
|
||||
if ((fdo = open(name, O_CREAT | O_TRUNC | O_WRONLY, 0666)) == -1)
|
||||
err(2, "%s", name);
|
||||
if (!(tname = strdup(name)))
|
||||
err(2, NULL);
|
||||
puthdr(fdo, &ohdr);
|
||||
for (i = I_LDR; i <= I_CLNT; i++) {
|
||||
fname = i == I_LDR ? lname : i == I_BTX ? bname : iname;
|
||||
switch (i) {
|
||||
case I_LDR:
|
||||
copy(fdi[i], fdo, ldr_size, 0);
|
||||
seekx(fdo, ohdr.size += ohdr.text);
|
||||
break;
|
||||
case I_BTX:
|
||||
writex(fdo, &btx, sizeof(btx));
|
||||
copy(fdi[i], fdo, btx.btx_textsz - sizeof(btx),
|
||||
sizeof(btx));
|
||||
break;
|
||||
case I_CLNT:
|
||||
copy(fdi[i], fdo, ihdr.size, 0);
|
||||
if (ftruncate(fdo, ohdr.size += ohdr.data))
|
||||
err(2, "%s", tname);
|
||||
}
|
||||
if (close(fdi[i]))
|
||||
err(2, "%s", fname);
|
||||
}
|
||||
if (close(fdo))
|
||||
err(2, "%s", tname);
|
||||
if (rename(tname, oname))
|
||||
err(2, "%s: Can't rename to %s", tname, oname);
|
||||
tname = NULL;
|
||||
if (verbose) {
|
||||
printf(binfo, btx.btx_majver, btx.btx_minver, btx.btx_textsz,
|
||||
BTX_ORIGIN(btx), BTX_ENTRY(btx), BTX_MAPPED(btx) *
|
||||
BTX_PGSIZE / 0x100000, !!(btx.btx_flags & BTX_MAPONE),
|
||||
BTX_MAPPED(btx) - btx.btx_pgctl - BTX_PGBASE /
|
||||
BTX_PGSIZE - BTX_MAPPED(btx) * 4 / BTX_PGSIZE);
|
||||
printf(cinfo, fmtlist[ihdr.fmt], ihdr.size, ihdr.text,
|
||||
ihdr.data, ihdr.bss, ihdr.entry);
|
||||
printf(oinfo, fmtlist[ohdr.fmt], ohdr.size, ohdr.text,
|
||||
ohdr.data, ohdr.org, ohdr.entry);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Read BTX file header.
|
||||
*/
|
||||
static void
|
||||
getbtx(int fd, struct btx_hdr * btx)
|
||||
{
|
||||
if (readx(fd, btx, sizeof(*btx), 0) != sizeof(*btx) ||
|
||||
btx->btx_magic[0] != BTX_MAG0 ||
|
||||
btx->btx_magic[1] != BTX_MAG1 ||
|
||||
btx->btx_magic[2] != BTX_MAG2)
|
||||
errx(1, "%s: Not a BTX kernel", fname);
|
||||
}
|
||||
|
||||
/*
|
||||
* Get file size and read a.out or ELF header.
|
||||
*/
|
||||
static void
|
||||
gethdr(int fd, struct hdr *hdr)
|
||||
{
|
||||
struct stat sb;
|
||||
const struct exec *ex;
|
||||
const Elf32_Ehdr *ee;
|
||||
const Elf32_Phdr *ep;
|
||||
void *p;
|
||||
unsigned fmt, x, n, i;
|
||||
|
||||
memset(hdr, 0, sizeof(*hdr));
|
||||
if (fstat(fd, &sb))
|
||||
err(2, "%s", fname);
|
||||
if (sb.st_size > MAXU32)
|
||||
errx(1, "%s: Too big", fname);
|
||||
hdr->size = sb.st_size;
|
||||
if ((p = mmap(NULL, hdr->size, PROT_READ, MAP_SHARED, fd,
|
||||
0)) == MAP_FAILED)
|
||||
err(2, "%s", fname);
|
||||
for (fmt = F_CNT - 1; !hdr->fmt && fmt; fmt--)
|
||||
switch (fmt) {
|
||||
case F_AOUT:
|
||||
ex = p;
|
||||
if (hdr->size >= sizeof(struct exec) && !N_BADMAG(*ex)) {
|
||||
hdr->fmt = fmt;
|
||||
x = N_GETMAGIC(*ex);
|
||||
if (x == OMAGIC || x == NMAGIC) {
|
||||
if (x == NMAGIC)
|
||||
Warn(fname, "Treating %s NMAGIC as OMAGIC",
|
||||
fmtlist[fmt]);
|
||||
hdr->flags |= IMPURE;
|
||||
}
|
||||
hdr->text = ex->a_text;
|
||||
hdr->data = ex->a_data;
|
||||
hdr->bss = ex->a_bss;
|
||||
hdr->entry = ex->a_entry;
|
||||
if (ex->a_entry >= BTX_PGSIZE)
|
||||
hdr->org = BTX_PGSIZE;
|
||||
}
|
||||
break;
|
||||
case F_ELF:
|
||||
ee = p;
|
||||
if (hdr->size >= sizeof(Elf32_Ehdr) && IS_ELF(*ee)) {
|
||||
hdr->fmt = fmt;
|
||||
for (n = i = 0; i < ee->e_phnum; i++) {
|
||||
ep = (void *)((uint8_t *)p + ee->e_phoff +
|
||||
ee->e_phentsize * i);
|
||||
if (ep->p_type == PT_LOAD)
|
||||
switch (n++) {
|
||||
case 0:
|
||||
hdr->text = ep->p_filesz;
|
||||
hdr->org = ep->p_paddr;
|
||||
if (ep->p_flags & PF_W)
|
||||
hdr->flags |= IMPURE;
|
||||
break;
|
||||
case 1:
|
||||
hdr->data = ep->p_filesz;
|
||||
hdr->bss = ep->p_memsz - ep->p_filesz;
|
||||
break;
|
||||
case 2:
|
||||
Warn(fname,
|
||||
"Ignoring extra %s PT_LOAD segments",
|
||||
fmtlist[fmt]);
|
||||
}
|
||||
}
|
||||
hdr->entry = ee->e_entry;
|
||||
}
|
||||
}
|
||||
if (munmap(p, hdr->size))
|
||||
err(2, "%s", fname);
|
||||
}
|
||||
|
||||
/*
|
||||
* Write a.out or ELF header.
|
||||
*/
|
||||
static void
|
||||
puthdr(int fd, struct hdr *hdr)
|
||||
{
|
||||
struct exec ex;
|
||||
struct elfh eh;
|
||||
|
||||
switch (hdr->fmt) {
|
||||
case F_AOUT:
|
||||
memset(&ex, 0, sizeof(ex));
|
||||
N_SETMAGIC(ex, ZMAGIC, MID_ZERO, 0);
|
||||
hdr->text = N_ALIGN(ex, hdr->text);
|
||||
ex.a_text = hdr->text;
|
||||
hdr->data = N_ALIGN(ex, hdr->data);
|
||||
ex.a_data = hdr->data;
|
||||
ex.a_entry = hdr->entry;
|
||||
writex(fd, &ex, sizeof(ex));
|
||||
hdr->size = N_ALIGN(ex, sizeof(ex));
|
||||
seekx(fd, hdr->size);
|
||||
break;
|
||||
case F_ELF:
|
||||
eh = elfhdr;
|
||||
eh.e.e_entry = hdr->entry;
|
||||
eh.p[0].p_vaddr = eh.p[0].p_paddr = hdr->org;
|
||||
eh.p[0].p_filesz = eh.p[0].p_memsz = hdr->text;
|
||||
eh.p[1].p_offset = eh.p[0].p_offset + eh.p[0].p_filesz;
|
||||
eh.p[1].p_vaddr = eh.p[1].p_paddr = align(eh.p[0].p_paddr +
|
||||
eh.p[0].p_memsz, 4);
|
||||
eh.p[1].p_filesz = eh.p[1].p_memsz = hdr->data;
|
||||
eh.sh[2].sh_addr = eh.p[0].p_vaddr;
|
||||
eh.sh[2].sh_offset = eh.p[0].p_offset;
|
||||
eh.sh[2].sh_size = eh.p[0].p_filesz;
|
||||
eh.sh[3].sh_addr = eh.p[1].p_vaddr;
|
||||
eh.sh[3].sh_offset = eh.p[1].p_offset;
|
||||
eh.sh[3].sh_size = eh.p[1].p_filesz;
|
||||
writex(fd, &eh, sizeof(eh));
|
||||
hdr->size = sizeof(eh);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Safe copy from input file to output file.
|
||||
*/
|
||||
static void
|
||||
copy(int fdi, int fdo, size_t nbyte, off_t offset)
|
||||
{
|
||||
char buf[8192];
|
||||
size_t n;
|
||||
|
||||
while (nbyte) {
|
||||
if ((n = sizeof(buf)) > nbyte)
|
||||
n = nbyte;
|
||||
if (readx(fdi, buf, n, offset) != n)
|
||||
errx(2, "%s: Short read", fname);
|
||||
writex(fdo, buf, n);
|
||||
nbyte -= n;
|
||||
offset = -1;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Safe read from input file.
|
||||
*/
|
||||
static size_t
|
||||
readx(int fd, void *buf, size_t nbyte, off_t offset)
|
||||
{
|
||||
ssize_t n;
|
||||
|
||||
if (offset != -1 && lseek(fd, offset, SEEK_SET) != offset)
|
||||
err(2, "%s", fname);
|
||||
if ((n = read(fd, buf, nbyte)) == -1)
|
||||
err(2, "%s", fname);
|
||||
return n;
|
||||
}
|
||||
|
||||
/*
|
||||
* Safe write to output file.
|
||||
*/
|
||||
static void
|
||||
writex(int fd, const void *buf, size_t nbyte)
|
||||
{
|
||||
ssize_t n;
|
||||
|
||||
if ((n = write(fd, buf, nbyte)) == -1)
|
||||
err(2, "%s", tname);
|
||||
if (n != nbyte)
|
||||
errx(2, "%s: Short write", tname);
|
||||
}
|
||||
|
||||
/*
|
||||
* Safe seek in output file.
|
||||
*/
|
||||
static void
|
||||
seekx(int fd, off_t offset)
|
||||
{
|
||||
if (lseek(fd, offset, SEEK_SET) != offset)
|
||||
err(2, "%s", tname);
|
||||
}
|
||||
|
||||
/*
|
||||
* Convert an option argument to a format code.
|
||||
*/
|
||||
static unsigned
|
||||
optfmt(const char *arg)
|
||||
{
|
||||
unsigned i;
|
||||
|
||||
for (i = 0; i < F_CNT && strcmp(arg, fmtlist[i]); i++);
|
||||
if (i == F_CNT)
|
||||
errx(1, "%s: Unknown format", arg);
|
||||
return i;
|
||||
}
|
||||
|
||||
/*
|
||||
* Convert an option argument to an address.
|
||||
*/
|
||||
static uint32_t
|
||||
optaddr(const char *arg)
|
||||
{
|
||||
char *s;
|
||||
unsigned long x;
|
||||
|
||||
errno = 0;
|
||||
x = strtoul(arg, &s, 0);
|
||||
if (errno || !*arg || *s || x > MAXU32)
|
||||
errx(1, "%s: Illegal address", arg);
|
||||
return x;
|
||||
}
|
||||
|
||||
/*
|
||||
* Convert an option argument to a page number.
|
||||
*/
|
||||
static int
|
||||
optpage(const char *arg, int hi)
|
||||
{
|
||||
char *s;
|
||||
long x;
|
||||
|
||||
errno = 0;
|
||||
x = strtol(arg, &s, 0);
|
||||
if (errno || !*arg || *s || x < 0 || x > hi)
|
||||
errx(1, "%s: Illegal page number", arg);
|
||||
return x;
|
||||
}
|
||||
|
||||
/*
|
||||
* Display a warning.
|
||||
*/
|
||||
static void
|
||||
Warn(const char *locus, const char *fmt, ...)
|
||||
{
|
||||
va_list ap;
|
||||
char *s;
|
||||
|
||||
if (!quiet) {
|
||||
asprintf(&s, "%s: Warning: %s", locus, fmt);
|
||||
va_start(ap, fmt);
|
||||
vwarnx(s, ap);
|
||||
va_end(ap);
|
||||
free(s);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Display usage information.
|
||||
*/
|
||||
static void
|
||||
usage(void)
|
||||
{
|
||||
fprintf(stderr, "%s\n%s\n",
|
||||
"usage: btxld [-qv] [-b file] [-E address] [-e address] [-f format]",
|
||||
" [-l file] [-o filename] [-P page] [-W page] file");
|
||||
exit(1);
|
||||
}
|
122
usr.sbin/btxld/elfh.c
Normal file
122
usr.sbin/btxld/elfh.c
Normal file
|
@ -0,0 +1,122 @@
|
|||
/*
|
||||
* Copyright (c) 1998 Robert Nordier
|
||||
* 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.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
||||
*
|
||||
* $Id:$
|
||||
*/
|
||||
|
||||
#include <stddef.h>
|
||||
#include "elfh.h"
|
||||
|
||||
#define SET_ME 0xeeeeeeee /* filled in by btxld */
|
||||
|
||||
/*
|
||||
* ELF header template.
|
||||
*/
|
||||
const struct elfh elfhdr = {
|
||||
{
|
||||
{
|
||||
ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3, /* e_ident */
|
||||
ELFCLASS32, ELFDATA2LSB, EV_CURRENT, 0,
|
||||
'F', 'r', 'e', 'e', 'B', 'S', 'D', 0
|
||||
},
|
||||
ET_EXEC, /* e_type */
|
||||
EM_386, /* e_machine */
|
||||
EV_CURRENT, /* e_version */
|
||||
SET_ME, /* e_entry */
|
||||
offsetof(struct elfh, p), /* e_phoff */
|
||||
offsetof(struct elfh, sh), /* e_shoff */
|
||||
0, /* e_flags */
|
||||
sizeof(elfhdr.e), /* e_ehsize */
|
||||
sizeof(elfhdr.p[0]), /* e_phentsize */
|
||||
sizeof(elfhdr.p) / sizeof(elfhdr.p[0]), /* e_phnum */
|
||||
sizeof(elfhdr.sh[0]), /* e_shentsize */
|
||||
sizeof(elfhdr.sh) / sizeof(elfhdr.sh[0]), /* e_shnum */
|
||||
1 /* e_shstrndx */
|
||||
},
|
||||
{
|
||||
{
|
||||
PT_LOAD, /* p_type */
|
||||
sizeof(elfhdr), /* p_offset */
|
||||
SET_ME, /* p_vaddr */
|
||||
SET_ME, /* p_paddr */
|
||||
SET_ME, /* p_filesz */
|
||||
SET_ME, /* p_memsz */
|
||||
PF_R | PF_X, /* p_flags */
|
||||
0x1000 /* p_align */
|
||||
},
|
||||
{
|
||||
PT_LOAD, /* p_type */
|
||||
SET_ME, /* p_offset */
|
||||
SET_ME, /* p_vaddr */
|
||||
SET_ME, /* p_paddr */
|
||||
SET_ME, /* p_filesz */
|
||||
SET_ME, /* p_memsz */
|
||||
PF_R | PF_W, /* p_flags */
|
||||
0x1000 /* p_align */
|
||||
}
|
||||
},
|
||||
{
|
||||
{
|
||||
0, SHT_NULL, 0, 0, 0, 0, SHN_UNDEF, 0, 0, 0
|
||||
},
|
||||
{
|
||||
1, /* sh_name */
|
||||
SHT_STRTAB, /* sh_type */
|
||||
0, /* sh_flags */
|
||||
0, /* sh_addr */
|
||||
offsetof(struct elfh, shstrtab), /* sh_offset */
|
||||
sizeof(elfhdr.shstrtab), /* sh_size */
|
||||
SHN_UNDEF, /* sh_link */
|
||||
0, /* sh_info */
|
||||
1, /* sh_addralign */
|
||||
0 /* sh_entsize */
|
||||
},
|
||||
{
|
||||
0xb, /* sh_name */
|
||||
SHT_PROGBITS, /* sh_type */
|
||||
SHF_EXECINSTR | SHF_ALLOC, /* sh_flags */
|
||||
SET_ME, /* sh_addr */
|
||||
SET_ME, /* sh_offset */
|
||||
SET_ME, /* sh_size */
|
||||
SHN_UNDEF, /* sh_link */
|
||||
0, /* sh_info */
|
||||
4, /* sh_addralign */
|
||||
0 /* sh_entsize */
|
||||
},
|
||||
{
|
||||
0x11, /* sh_name */
|
||||
SHT_PROGBITS, /* sh_type */
|
||||
SHF_ALLOC | SHF_WRITE, /* sh_flags */
|
||||
SET_ME, /* sh_addr */
|
||||
SET_ME, /* sh_offset */
|
||||
SET_ME, /* sh_size */
|
||||
SHN_UNDEF, /* sh_link */
|
||||
0, /* sh_info */
|
||||
4, /* sh_addralign */
|
||||
0 /* sh_entsize */
|
||||
}
|
||||
},
|
||||
"\0.shstrtab\0.text\0.data" /* shstrtab */
|
||||
};
|
38
usr.sbin/btxld/elfh.h
Normal file
38
usr.sbin/btxld/elfh.h
Normal file
|
@ -0,0 +1,38 @@
|
|||
/*
|
||||
* Copyright (c) 1998 Robert Nordier
|
||||
* 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.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
||||
*
|
||||
* $Id:$
|
||||
*/
|
||||
|
||||
#include <elf.h>
|
||||
|
||||
struct elfh {
|
||||
Elf32_Ehdr e; /* ELF header */
|
||||
Elf32_Phdr p[2]; /* program header */
|
||||
Elf32_Shdr sh[4]; /* section header */
|
||||
char shstrtab[28]; /* section header string table */
|
||||
};
|
||||
|
||||
const struct elfh elfhdr; /* ELF header template */
|
Loading…
Reference in a new issue