minix/sys/lib/libsa/loadfile_ecoff.c

148 lines
3.9 KiB
C
Raw Normal View History

/* $NetBSD: loadfile_ecoff.c,v 1.12 2008/04/28 20:24:06 martin Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center and by Christos Zoulas.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#ifdef _STANDALONE
#include <lib/libsa/stand.h>
#include <lib/libkern/libkern.h>
#else
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <err.h>
#endif
#include <sys/param.h>
#include <sys/exec.h>
#include "loadfile.h"
#ifdef BOOT_ECOFF
int
loadfile_coff(int fd, struct ecoff_exechdr *coff, u_long *marks, int flags)
{
paddr_t offset = marks[MARK_START];
paddr_t minp = ~0, maxp = 0, pos;
ssize_t nr;
/* some ports dont use the offset */
offset = offset;
/* Read in text. */
if (lseek(fd, ECOFF_TXTOFF(coff), SEEK_SET) == -1) {
WARN(("lseek text"));
return 1;
}
if (coff->a.tsize != 0) {
if (flags & LOAD_TEXT) {
PROGRESS(("%lu", coff->a.tsize));
nr = READ(fd, coff->a.text_start, coff->a.tsize);
if (nr == -1) {
return 1;
}
if (nr != coff->a.tsize) {
errno = EIO;
return 1;
}
}
else {
if (lseek(fd, coff->a.tsize, SEEK_CUR) == -1) {
WARN(("read text"));
return 1;
}
}
if (flags & (COUNT_TEXT|LOAD_TEXT)) {
pos = coff->a.text_start;
if (minp > pos)
minp = pos;
pos += coff->a.tsize;
if (maxp < pos)
maxp = pos;
}
}
/* Read in data. */
if (coff->a.dsize != 0) {
if (flags & LOAD_DATA) {
PROGRESS(("+%lu", coff->a.dsize));
nr = READ(fd, coff->a.data_start, coff->a.dsize);
if (nr == -1) {
WARN(("read data"));
return 1;
}
if (nr != coff->a.dsize) {
errno = EIO;
WARN(("read data"));
return 1;
}
}
if (flags & (COUNT_DATA|LOAD_DATA)) {
pos = coff->a.data_start;
if (minp > pos)
minp = pos;
pos += coff->a.dsize;
if (maxp < pos)
maxp = pos;
}
}
/* Zero out bss. */
if (coff->a.bsize != 0) {
if (flags & LOAD_BSS) {
PROGRESS(("+%lu", coff->a.bsize));
BZERO(coff->a.bss_start, coff->a.bsize);
}
if (flags & (COUNT_BSS|LOAD_BSS)) {
pos = coff->a.bss_start;
if (minp > pos)
minp = pos;
pos = coff->a.bsize;
if (maxp < pos)
maxp = pos;
}
}
marks[MARK_START] = LOADADDR(minp);
marks[MARK_ENTRY] = LOADADDR(coff->a.entry);
marks[MARK_NSYM] = 1; /* XXX: Kernel needs >= 0 */
marks[MARK_SYM] = LOADADDR(maxp);
marks[MARK_END] = LOADADDR(maxp);
marks[MARK_DATA] = LOADADDR(coff->a.data_start);
return 0;
}
#endif /* BOOT_ECOFF */