freebsd-skq/usr.sbin/kgzip/kgzld.c
Robert Nordier 4566a1d1d3 kgzip is a kzip(8) replacement able to compress and link bootable
32-bit binaries in both ELF and a.out format.

Development sponsored by Global Technology Associates, Inc.

Reviewed/tested by: abial
1999-07-19 18:00:18 +00:00

81 lines
2.5 KiB
C

/*
* Copyright (c) 1999 Global Technology Associates, Inc.
* 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 <sys/types.h>
#include <sys/wait.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "elfhdr.h"
#include "kgzip.h"
#define KGZOFF sizeof(struct kgz_elfhdr)
#define align(x, y) (((x) + (y) - 1) & ~((y) - 1))
/*
* Link KGZ file and loader.
*/
void
kgzld(struct kgz_hdr * kh, const char *f1, const char *f2)
{
char addr[16];
struct iodesc idi;
pid_t pid;
size_t n;
int status;
if (strcmp(kh->ident, "KGZ")) {
if ((idi.fd = open(idi.fname = f1, O_RDONLY)) == -1)
err(1, "%s", idi.fname);
n = xread(&idi, kh, sizeof(*kh), KGZOFF);
xclose(&idi);
if (n != sizeof(*kh) || strcmp(kh->ident, "KGZ"))
errx(1, "%s: Invalid format", idi.fname);
}
sprintf(addr, "%#x", align(kh->dload + kh->dsize, 0x1000));
switch (pid = fork()) {
case -1:
err(1, NULL);
case 0:
execlp("ld", "ld", "-Ttext", addr, "-o", f2, loader, f1, NULL);
warn(NULL);
_exit(1);
default:
if ((pid = waitpid(pid, &status, 0)) == -1)
err(1, NULL);
if (WIFSIGNALED(status) || WEXITSTATUS(status))
exit(1);
}
}