1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1999 Global Technology Associates, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
21 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
22 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
23 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
25 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
26 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $FreeBSD: stable/11/usr.sbin/kgzip/kgzld.c 330449 2018-03-05 07:26:05Z eadler $
29 */
30
31#include <sys/types.h>
32#include <sys/endian.h>
33#include <sys/wait.h>
34
35#include <err.h>
36#include <fcntl.h>
37#include <stdio.h>
38#include <stdlib.h>
39#include <string.h>
40#include <unistd.h>
41
42#include "aouthdr.h"
43#include "elfhdr.h"
44#include "kgzip.h"
45
46#define align(x, y) (((x) + (y) - 1) & ~((y) - 1))
47
48/*
49 * Link KGZ file and loader.
50 */
51void
52kgzld(struct kgz_hdr * kh, const char *f1, const char *f2)
53{
54    char addr[16];
55    struct iodesc idi;
56    pid_t pid;
57    size_t n;
58    int status;
59
60    if (strcmp(kh->ident, "KGZ")) {
61	if ((idi.fd = open(idi.fname = f1, O_RDONLY)) == -1)
62	    err(1, "%s", idi.fname);
63	if (!format) {
64	    union {
65		struct exec ex;
66		Elf32_Ehdr ee;
67	    } hdr;
68	    n = xread(&idi, &hdr, sizeof(hdr), 0);
69	    if (n >= sizeof(hdr.ee) && IS_ELF(hdr.ee))
70		format = F_ELF;
71	    else if (n >= sizeof(hdr.ex) &&
72		     N_GETMAGIC(hdr.ex) == OMAGIC)
73		format = F_AOUT;
74	    if (!format)
75		errx(1, "%s: Format not supported", idi.fname);
76	}
77	n = xread(&idi, kh, sizeof(*kh),
78		  format == F_AOUT ? sizeof(struct kgz_aouthdr0)
79				   : sizeof(struct kgz_elfhdr));
80	xclose(&idi);
81	if (n != sizeof(*kh) || strcmp(kh->ident, "KGZ"))
82	    errx(1, "%s: Invalid format", idi.fname);
83    }
84    sprintf(addr, "%#x", align(kh->dload + kh->dsize, 0x1000));
85    switch (pid = fork()) {
86    case -1:
87	err(1, NULL);
88    case 0:
89	if (format == F_AOUT)
90	    execlp("ld", "ld", "-aout", "-Z", "-T", addr, "-o", f2,
91		   loader, f1, (char *)NULL);
92	else
93	    execlp("ld", "ld", "-Ttext", addr, "-o", f2, loader, f1,
94		   (char *)NULL);
95	warn(NULL);
96	_exit(1);
97    default:
98	if ((pid = waitpid(pid, &status, 0)) == -1)
99	    err(1, NULL);
100	if (WIFSIGNALED(status) || WEXITSTATUS(status))
101	    exit(1);
102    }
103}
104