kgzld.c revision 79452 
1/*
2 * Copyright (c) 1999 Global Technology Associates, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
18 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
19 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
20 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
21 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
23 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
24 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: head/usr.sbin/kgzip/kgzld.c 79452 2001-07-09 09:24:06Z brian $
27 */
28
29#include <sys/types.h>
30#include <sys/wait.h>
31
32#include <err.h>
33#include <fcntl.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37#include <unistd.h>
38
39#include "aouthdr.h"
40#include "elfhdr.h"
41#include "kgzip.h"
42
43#define align(x, y) (((x) + (y) - 1) & ~((y) - 1))
44
45/*
46 * Link KGZ file and loader.
47 */
48void
49kgzld(struct kgz_hdr * kh, const char *f1, const char *f2)
50{
51    char addr[16];
52    struct iodesc idi;
53    pid_t pid;
54    size_t n;
55    int status;
56
57    if (strcmp(kh->ident, "KGZ")) {
58	if ((idi.fd = open(idi.fname = f1, O_RDONLY)) == -1)
59	    err(1, "%s", idi.fname);
60	if (!format) {
61	    union {
62		struct exec ex;
63		Elf32_Ehdr ee;
64	    } hdr;
65	    n = xread(&idi, &hdr, sizeof(hdr), 0);
66	    if (n >= sizeof(hdr.ee) && IS_ELF(hdr.ee))
67		format = F_ELF;
68	    else if (n >= sizeof(hdr.ex) &&
69		     N_GETMAGIC(hdr.ex) == OMAGIC)
70		format = F_AOUT;
71	    if (!format)
72		errx(1, "%s: Format not supported", idi.fname);
73	}
74	n = xread(&idi, kh, sizeof(*kh),
75		  format == F_AOUT ? sizeof(struct kgz_aouthdr0)
76				   : sizeof(struct kgz_elfhdr));
77	xclose(&idi);
78	if (n != sizeof(*kh) || strcmp(kh->ident, "KGZ"))
79	    errx(1, "%s: Invalid format", idi.fname);
80    }
81    sprintf(addr, "%#x", align(kh->dload + kh->dsize, 0x1000));
82    switch (pid = fork()) {
83    case -1:
84	err(1, NULL);
85    case 0:
86	if (format == F_AOUT)
87	    execlp("ld", "ld", "-aout", "-Z", "-T", addr, "-o", f2,
88		   loader, f1, (char *)NULL);
89	else
90	    execlp("ld", "ld", "-Ttext", addr, "-o", f2, loader, f1,
91		   (char *)NULL);
92	warn(NULL);
93	_exit(1);
94    default:
95	if ((pid = waitpid(pid, &status, 0)) == -1)
96	    err(1, NULL);
97	if (WIFSIGNALED(status) || WEXITSTATUS(status))
98	    exit(1);
99    }
100}
101