diff options
Diffstat (limited to 'usr.sbin/config/exec_aout.c')
| -rw-r--r-- | usr.sbin/config/exec_aout.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/usr.sbin/config/exec_aout.c b/usr.sbin/config/exec_aout.c new file mode 100644 index 00000000000..0647a77baef --- /dev/null +++ b/usr.sbin/config/exec_aout.c @@ -0,0 +1,148 @@ +/* $OpenBSD: exec_aout.c,v 1.1 1999/10/04 20:00:51 deraadt Exp $ */ + +/* + * Copyright (c) 1999 Mats O Jansson. 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Mats O Jansson. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. + */ + +#ifndef LINT +static char rcsid[] = "$OpenBSD: exec_aout.c,v 1.1 1999/10/04 20:00:51 deraadt Exp $"; +#endif + +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <nlist.h> +#include <stdlib.h> +#include <stdio.h> +#include <unistd.h> +#include <sys/exec.h> +#include <sys/types.h> + +#include "ukc.h" + +caddr_t aout_p,aout_r; +int aout_psz = 0, aout_rsz = 0; +struct exec aout_ex; + +caddr_t +aout_adjust(x) + caddr_t x; +{ + unsigned long y; + + y = (unsigned long)x - nl[P_KERNEL_TEXT].n_value + (unsigned long)aout_p + + N_TXTOFF(aout_ex); + return((caddr_t)y); +} + +caddr_t +aout_readjust(x) + caddr_t x; +{ + unsigned long y; + + y = (unsigned long)x - (unsigned long)aout_p + nl[P_KERNEL_TEXT].n_value - + N_TXTOFF(aout_ex); + return((caddr_t)y); +} + +int +aout_check(file) + char *file; +{ + int fd, ret = 1; + + if ((fd = open(file, O_RDONLY | O_EXLOCK, 0)) < 0) + return (0); + if (read(fd, (char *)&aout_ex, sizeof(aout_ex)) != sizeof(aout_ex)) + ret = 0; + if (ret) { + if (N_BADMAG(aout_ex)) + ret = 0; + } + + close(fd); + return (ret); +} + +void +aout_loadkernel(file) + char *file; +{ + int fd; + off_t cur,end; + + if ((fd = open(file, O_RDONLY | O_EXLOCK, 0)) < 0) + err(1, file, errno); + + if (read(fd, (char *)&aout_ex, sizeof(aout_ex)) != sizeof(aout_ex)) + errx(1, "can't read a.out header"); + + if (N_BADMAG(aout_ex)) + errx(1, "bad a.out magic\n"); + + (void)lseek(fd, (off_t)0, SEEK_SET); + + aout_psz = (int)(aout_ex.a_text+aout_ex.a_data); + + aout_p = malloc(aout_psz); + + if (read(fd, aout_p, aout_psz) != aout_psz) + errx(1, "can't read a.out text and data"); + + cur = lseek(fd, (off_t)0, SEEK_CUR); + end = lseek(fd, (off_t)0, SEEK_END); + (void)lseek(fd, cur, SEEK_SET); + + aout_rsz = (int)(end - cur); + + aout_r = malloc(aout_rsz); + + if (read(fd, aout_r, aout_rsz) != aout_rsz) + errx(1, "can't read rest of file %s", file); + + close(fd); +} + +void +aout_savekernel(outfile) + char *outfile; +{ + int fd; + + if ((fd = open(outfile, O_WRONLY | O_CREAT | O_TRUNC, 0755)) < 0) + err(1, outfile, errno); + + if (write(fd, aout_p, aout_psz) != aout_psz) + errx(1, "can't write a.out text and data"); + + if (write(fd, aout_r, aout_rsz) != aout_rsz) + errx(1, "can't write rest of file %s", outfile); + + close(fd); +} |