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/* $NetBSD: aout.c,v 1.12 2009/03/18 16:00:10 cegger Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Leo Weppelman.
*
* 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 TOSTOOLS
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <a_out.h>
#define MALLOC(x) malloc(x)
#else
#include <lib/libsa/stand.h>
#include <atari_stand.h>
#include <libkern.h>
#include <sys/exec_aout.h>
#define MALLOC(x) alloc(x)
#endif
#include "libtos.h"
#include "kparamb.h"
#include "tosdefs.h"
#include "cread.h"
#ifdef TOSTOOLS
/*
* Assume compiling under TOS or MINT. The page-size will always
* be incorrect then (if it is defined anyway).
*/
#ifdef AOUT_LDPGSZ
#undef AOUT_LDPGSZ
#endif
#define AOUT_LDPGSZ (8*1024) /* Page size for NetBSD */
#endif /* TOSTOOLS */
/*
* Load an a.out image.
* Exit codes:
* -1 : Not an a.outfile
* 0 : OK
* error# : Error during load (*errp might contain error string).
*/
int
aout_load(int fd, osdsc_t *od, char **errp, int loadsyms)
{
long textsz, stringsz;
struct exec ehdr;
int err;
*errp = NULL;
lseek(fd, (off_t)0, SEEK_SET);
if (read(fd, (char *)&ehdr, sizeof(ehdr)) != sizeof(ehdr))
return -1;
#ifdef TOSTOOLS
if ((ehdr.a_magic & 0xffff) != NMAGIC)
return -1;
#else
if ((N_GETMAGIC(ehdr) != NMAGIC) && (N_GETMAGIC(ehdr) != OMAGIC))
return -1;
#endif
/*
* Extract various sizes from the kernel executable
*/
textsz = (ehdr.a_text + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1);
od->k_esym = 0;
od->ksize = textsz + ehdr.a_data + ehdr.a_bss;
od->kentry = ehdr.a_entry;
if (loadsyms && ehdr.a_syms) {
err = 1;
if (lseek(fd, ehdr.a_text+ehdr.a_data+ehdr.a_syms+sizeof(ehdr),
0) <= 0)
goto error;
err = 2;
if (read(fd, (char *)&stringsz, sizeof(long)) != sizeof(long))
goto error;
err = 3;
if (lseek(fd, sizeof(ehdr), 0) <= 0)
goto error;
od->ksize += ehdr.a_syms + sizeof(long) + stringsz;
}
err = 4;
if ((od->kstart = (u_char *)MALLOC(od->ksize)) == NULL)
goto error;
/*
* Read text & data, clear bss
*/
err = 5;
if ((read(fd, (char *)(od->kstart), ehdr.a_text) != ehdr.a_text)
||(read(fd,(char *)(od->kstart+textsz),ehdr.a_data) != ehdr.a_data))
goto error;
memset(od->kstart + textsz + ehdr.a_data, 0, ehdr.a_bss);
/*
* Read symbol and string table
*/
if (loadsyms && ehdr.a_syms) {
long *p;
p = (long *)((od->kstart) + textsz + ehdr.a_data + ehdr.a_bss);
*p++ = ehdr.a_syms;
err = 6;
if (read(fd, (char *)p, ehdr.a_syms) != ehdr.a_syms)
goto error;
p = (long *)((char *)p + ehdr.a_syms);
err = 7;
if (read(fd, (char *)p, stringsz) != stringsz)
goto error;
od->k_esym = (long)((char *)p-(char *)od->kstart +stringsz);
}
return 0;
error:
#ifdef TOSTOOLS
{
static char *errs[] = {
/* 1 */ "Cannot seek to string table",
/* 2 */ "Cannot read string-table size",
/* 3 */ "Cannot seek back to text start",
/* 4 */ "Cannot malloc kernel image space",
/* 5 */ "Unable to read kernel image",
/* 6 */ "Cannot read symbol table",
/* 7 */ "Cannot read string table"
};
*errp = errs[err];
}
#endif /* TOSTOOLS */
return err;
}
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